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Dr. Alfred Hofstadter, Ph.D., is the father of Leonard Hofstadter, Michael Hofstadter and a daughter and ex-husband of Beverly Hofstadter. He is an anthropologist who once worked with Dr. Louis Leakey.

Like the majority of the male protagonists' fathers, he has never been seen, but is mentioned several times though he finally appears in the last episode of Season 9.


Alfred is an anthropologist, living in New Jersey. He has worked with Dr. Louis Leakey whose surname ends up being his son Leonard's middle name ("The Middle-Earth Paradigm").

Marriage and Parenthood

At some point, Alfred married a woman named Beverly, but it's unknown how they got together. They had three children: Leonard, Michael and an unnamed daughter. The marriage was a loveless one, with Beverly being nothing but cold, emasculating, unaffectionate and distant towards Alfred and unmotherly towards their children. Beverly also ran an unbearably tight ship and seems to have cowed Alfred into following into her footsteps during their marriage. Leonard's relationship with Alfred was obviously a good one, given the latter's friendliness, but it also seemed to have been distant as Alfred would've likely spent a lot of time away from home, working in the field, unless he never worked away from home.

Although much of Leonard's childhood resentment stems from Beverly, Leonard has described how the only father-son time Alfred spent with him was with a 2,000-year-old skeleton of an Etruscan child ("The Fish Guts Displacement"). Leonard's lack of love from his parents as a child, particularly his mother, led him to build a hugging machine at the age of 10, which Alfred used to borrow ("The Maternal Capacitance").


Alfred's marriage to Beverly ended after he had an affair with a waitress from the university cafeteria. Beverly claims that Alfred's reasoning for cheating was that Beverly was "cold, emasculating and hadn't shown him affection for years". There's no love lost between them with Alfred describing Beverly as his "hateful shrew." and her calling him a "wrinkled old bastard." According to Beverly, she and Alfred only had intercourse for the purposes of reproduction, except for a pro forma consummation of their marriage. In 2009, Beverly told Penny that she hadn't had intercourse with Alfred in eight years and had been responsible for her own orgasms since 1982. From Leonard's comments, his father's physical health has improved since his divorce from Beverly.

Season 9

Alfred first appears when he and Leonard arrive at the apartment building and head up to Apartment 4A. He was curious to when the elevator would be fixed and Leonard said 'Any day, now' and so they took the stairs as everyone had to, which was okay with Alfred since he would prefer to have a heart attack rather than see Beverly. On the way up, he referred to Penny as a sweetie, showing that he seems to have been more supportive and respectful of her relationship with Leonard than Beverly has ever been.

Season 10

Alfred arrives with Mary at 4A and later attends his son's wedding redo ceremony. They spend the evening talking, but do not have an affair. They do announce that they plan on visiting each other at their homes in the future.


Despite divorcing his ex-wife, Beverly, because of an affair he had, and has his flaws, Alfred is not an awful person, he just had a difficult relationship with her. He is actually a charming, nice, gentle, caring, and intelligent man who cares and is proud of his son Leonard much more than Beverly is. He is a respectful person, referring to Sheldon as 'Dr. Cooper' out of deference to the latter's status.

His kind, friendly, loving and caring nature was also displayed as he and Leonard climb the stairs. Alfred says that Leonard's got a good one there (a good gal) and he asks "How the hell did you do that" which came across as gentle ribbing from Alfred as opposed to dismissiveness when Beverly says the same sort of thing.[1]

Alfred could be sharp-tongued and extremely cynical at times, especially where his ex-wife is concerned: after kindly and politely greeting his companions before Leonard and Penny's wedding, Alfred (without missing a beat) referred to Beverly as my hateful shrew, and stating later on that the thought of not having to see her sour face in the morning was enthralling to him. In drastic contrast, he immediately hit it off with Mary Cooper, with whom he bonded over their contempt for Beverly. He showed himself to be rather gentlemanly, stating that despite his own agnosticism he genuinely respected Mary's own, whereas Beverly mirthlessly scorned Christianity to Mary's face.



Beverly Hofstadter

Beverly Hofstadter, his ex-wife

Not much is known about their relationship, but it is known that they had a troubled marriage and Beverly does mention that they were getting divorced in "The Maternal Congruence" after he cheated on her with a waitress from the Princeton cafeteria. In that same episode she tells Penny that her divorce doesn't affect her too much because she and Alfred haven't had intercourse in 8 years and that she's been responsible for her own orgasm since 1982.

It is revealed in "The Raiders Minimization" that when Leonard was six, he walked in on his parents naked and Beverly was swatting Alfred's bottom with Leonard's brand new ping-pong paddle, and Leonard thought it was a dream until that episode. In her first appearance, she claimed to use sex only for procreation.

In "The Expedition Approximation" when Leonard and Penny go to Howard and Bernadette for advice on how to handle money while being married, Leonard tells Penny that while he grew up, his mother emasculated his father financially, and in every other aspect of his life.

In "The Convergence-Convergence", Beverly is appalled that Leonard invited his father without consulting her, but Leonard retaliates by saying that Leonard doesn't need his mother's permission for his father to be at his wedding. Beverly mentions that Alfred claimed she was cold, emasculating and hadn't showed him any physical affection for years. The two exes come into each other's presence once again in order to attend their son's re-wedding and snipe at each other, including at dinner where Beverly ends up interrupting Alfred's toast to Leonard followed by arguing with each other. Leonard noted that after the divorce his father stopped twitching and seemed to grow an inch and a half.

In "The Conjugal Conjecture", Alfred snapped at his ex-wife until at the wedding ceremony where he said that even though they brought the worse out of each other, the best thing to come out of their relationship was Leonard. Surprisingly Beverly agrees. On the way to the airport the next day, they seemed to be civil to each other for about one minute until they started bickering over Leonard's driving.

Perhaps the most prominent example of Beverly's extreme ignorance is represented by her own husband, Alfred. Though they were both brilliant and accomplished, she showed just as little emotion to him as she did Leonard. Though not seen on screen, it is heavily said that Beverly was cold and unloving towards him and this eventually provoked Alfred into having an affair with another woman, possibly on account of the fact that someone else would give more affection to him than Beverly. What is most noteworthy about this situation is that Beverly was completely incredulous to this and didn't seem to reflect on her own actions after the divorce, believing that their relationship crashed and burned for the sole reason that Alfred had an affair - she verbally stated that Alfred called her cold, emasculating and hadn't shown him any physical affection for years, completely ignorant to the fact that this was a faultless description of herself. In saying this, Beverly showed true emotional rage for the first time in the series, and this rage is purely self-righteous and shows she is unapologetic about how she treated him, not considering that her emasculating and misanthropic behaviour was the reason he'd discarded their relationship.

Leonard Hofstadter

Leonard Hofstadter, his son

Not much has been previously known about their relationship, although it is likely that Leonard likes his father more than his mother. Leonard and his father have a close relationship and both of them are very similar. Leonard has once referred to him as "Father", but called him "Dad" in the latter's first appearance. In "The Fish Guts Displacement", it appears that he wasn't very affectionate with Leonard since Leonard said that the only father-son time he spent was with a 2000-year-old skeleton of an Etruscan boy who Leonard hated which he had to compete against for his father's favor. He also borrowed Leonard's hugging machine to compensate for the lack of intimacy in his marriage with Beverly. His father worked with noted anthropologist Dr. Louis Leakey which was the source of Leonard's middle name. He does attend the redo of Leonard and Penny's wedding where he fights with his ex-wife and takes an interest in Mary Cooper. During Alfred's first appearance, he and Leonard are seen to get along fine, which shows that Alfred has total love for his son, even when at the restaurant he smiles at Leonard's toast to Penny and at him kissing her and then attempting to give his toast, tells Leonard that he is happy that he found a woman who loves and cares for him.

In "The Conjugal Conjecture", Alfred stood up at the wedding ceremony where he said that even though he and Beverly brought the worse out of each other, the best thing to come out of their relationship was Leonard. He was very proud of his son and daughter-in-law.

In "The Birthday Synchronicity", Leonard says that he has come to peace with his relationship with his parents, likely suggesting that Alfred and Leonard have had a better relationship.

Leonard's Siblings

Nothing is currently known about Alfred's relationship with his other two children, but it's likely that he is proud of them the same way he is of Leonard and holds all three of them in high regard.


Penny, his daughter-in-law

Alfred is very fond of Penny. He refers to her as a "sweetie" and toasts Leonard by saying that he is happy that Leonard found a woman who loves and cares for him. Penny had not seen him since the divorce before inviting him to their redo ceremony.


Sheldon Cooper

It is revealed that before Alfred's first appearance, he had met Sheldon at some point and they meet up again by addressing each other as "Dr. Hofstadter" and "Dr. Cooper", respectively. The relationship between them wasn't seen very further, but it's presumed that they are on very good terms. While Sheldon was still oblivious about the flirting going on between his mother and Alfred, Sheldon says that if he had known that Alfred was broke, he wouldn't have made a big deal about the bread and passes the bread to him, to Alfred's confusion. It's likely that the two could end up becoming stepfather and stepson after it appeared that Sheldon's mother had hooked up with Alfred. In "The Conjugal Conjecture", Sheldon shocked Alfred over his comments about his relationship with Sheldon's mother even asking if they had discussed Alfred's genitals. Sheldon also called him a mediocre academic with the sexual prowess that was subpar (according to Beverly). He compares him to Leonard with a bigger prostate.


Amy Farrah Fowler, his daughter-in-law's best friend

Alfred's relationship with Amy hasn't gone so far yet since during their only moment of talking was when Leonard introduced the two to each other, but they are presumably going to be on very good terms. In "The Conjugal Conjecture", sitting with Amy and hearing about her long courtship with Sheldon, he calls her a very patient woman. He pats her on the leg and Sheldon tells him to stop because she was his girlfriend.

You're a very patient young lady.

The other guys

Alfred and Stuart at Leonard and Penny's wedding redo

It is unknown whether Alfred has already met Howard, Raj and Bernadette since they had no chance of sharing scenes with him in his first appearance since the three were unable to make it to Leonard and Penny’s pre-wedding ceremony dinner because Howard was pulled over and being given a sobriety test by a police officer. Alfred has also presumably still not met Emily, Claire or Leslie.

Howard Wolowitz and Raj Koothrappali, his son's friends

Bernadette Rostenkowski-Wolowitz, a friend of his son and daughter-in-law

Alfred eventually met Stuart at the 2nd wedding ceremony, who was touched when Alfred and Beverly agreed that having Leonard was one of the best things from their marriage.

Stuart Bloom, a friend of his son and daughter-in-law

Mary Cooper

Mary Cooper, his friend and a possible future crush

Alfred meets Mary Cooper, Sheldon's mother in "The Convergence-Convergence". The two appear to get along really well, as seen in Amy's car where they bond over their mutual dislike of Beverly and express admiration in each other's beliefs and later at the restaurant they clink glasses and later, leave the restaurant for the hotel where their rooms are booked, implying the two could be sex|hooking up. Neither their respective sons nor anyone else can reach either of the two on their phone|phones later that night. In the next episode, they admit to having not slept together, but plan on still see each other. In "The Conjugal Conjecture", it is learned that they only enjoyed each other's company and did not spend the night together, though they do plan on visiting each other in the future.

Penny's Family

Penny's family, his daughter-in-law's family and his son's in-laws

Alfred is seen with Penny's father Wyatt, mother Susan and brother Randall in the Season 10 premiere "The Conjugal Conjecture", but they didn't mingle. However, Alfred is likely going to be on very good terms with them.

Judd Hirsch


  • Despite being an agnostic, Alfred prayed to God many times to turn Beverly into a pillar of salt. Mary Cooper says that it came close and God had turned Beverly into a giant block of ice.
  • While it's said that Alfred was not very affectionate with Leonard during the latter's childhood, the two men get along fine together during Alfred's first appearance. It is therefore unknown how he could be biased and withholding affection from Leonard and his siblings and denying birthdays and Christmas for them if he is a nice, gentle, charming, intelligent and caring man and in the episode "The Cooper-Hofstadter Polarization", Leonard said he could never please his parents. But there are possibilities:
    • Beverly likely turned him into someone a bit awful, controlled him and pushed him into doing what she did, but Alfred kept his true nature inside him and secretly had affection for his children, despite the fact that it is currently unknown what Alfred's relationship with Leonard's brother and sister is like, although it's possible he holds them, as well as Leonard, in high regard.
    • Because of him being an anthropologist, he may have been working very much that he wasn't able to leave the office to get to know his own children
    • Beverly forbade Alfred from showing affection to the kids.
  • In "The Contractual Obligation Implementation", Leonard says that he supposes he's always been into science since his mother and father are scientists and was kind of led in that direction, or a better word "pushed". But while it seems that Beverly pushed Leonard into science, Alfred would've obviously/likely let Leonard become whatever he would've wanted to be (even if it wasn't a science career or a career related to science), given his charming personality.
  • Before his first appearance, Alfred had last met Penny during his divorce which was in Season 3 or later and he had also met Sheldon likely at this point too, while it is unknown whether he had met Howard, Raj and Bernadette, and in his first appearance, he meets Amy for the first time. But it's possible he had already met Howard and Raj back then, given their much-spent time with Leonard, Sheldon and Penny and he meets Stuart and Bernadette for the first time at Leonard and Penny's re-wedding.
  • He is one of five fathers of every main character who has physically appeared on the show: the others being Rajesh Koothrappali's father V. M. Koothrappali, Penny's father Wyatt, Bernadette's father Mike Rostenkowski and Amy's father Larry Fowler (Sheldon's father is dead, Howard's left him at 11, Stuart's is only mentioned, Leslie's hasn't been seen or mentioned and Emily's is only mentioned and possibly dead).
  • Alfred is similar to his son Leonard Hofstadter. Luckily Leonard has his father's good looks and his high intelligence and his goodness. Both of them had to put up with two difficult people like Alfred putting up with his ex-wife Beverly and Leonard putting up with his room-mate Sheldon.
  • Alfred is also similar to Amy's father Larry Fowler. They have both been unhappily married to their children's mothers for years. However, unlike Larry, Alfred eventually managed to divorce his wife.



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Young Sheldon Episodes
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The Big Bang Theory Characters, Cast & Crew
Characters Main Leonard Hofstadter  ‧  Sheldon Cooper  ‧  Penny  ‧  Howard Wolowitz  ‧  Rajesh Koothrappali  ‧  Amy Farrah Fowler  ‧  Bernadette Rostenkowski-Wolowitz  ‧  Stuart Bloom  ‧  Emily Sweeney (formerly)  ‧  Leslie Winkle (formerly)  ‧  The Social Group
Recurring/Minor Debbie Wolowitz  ‧  Barry Kripke  ‧  Priya Koothrappali  ‧  Dr. V. M. Koothrappali  ‧  Mrs. Koothrappali  ‧  Stephanie Barnett  ‧  Lucy  ‧  Mary Cooper  ‧  Zack Johnson  ‧  Beverly Hofstadter  ‧  Mike Rostenkowski  ‧  Alex Jensen  ‧  Professor Proton  ‧  Missy Cooper  ‧  Ramona Nowitzki  ‧  Dan  ‧  Josh Wolowitz  ‧  Dennis Kim  ‧  Althea Davis  ‧  Jeanie  ‧  Cinnamon  ‧  Mrs. Rostenkowski  ‧  Wyatt  ‧  Claire  ‧  Kurt  ‧  Eric Gablehauser  ‧  Dave Gibbs  ‧  Dimitri  ‧  Alfred Hofstadter   ‧  Meemaw  ‧  Jimmy Speckerman  ‧  Susan  ‧  Randall  ‧  Bert Kibbler  ‧  President Siebert  ‧  Janine Davis  ‧  Colonel Richard Williams  ‧  Halley Wolowitz  ‧  Neil Michael Wolowitz  ‧  Denise  ‧  George Cooper Jr.   ‧  Larry Fowler  ‧  Anu  ‧  George Cooper Sr.  ‧  Marissa
Cast Regulars Johnny Galecki  ‧  Jim Parsons  ‧  Kaley Cuoco  ‧  Simon Helberg  ‧  Kunal Nayyar  ‧  Mayim Bialik  ‧  Melissa Rauch  ‧  Kevin Sussman  ‧  Laura Spencer  ‧  Sara Gilbert  ‧ 
Recurring/Minor Christine Baranski  ‧  Aarti Mann  ‧  John Ross Bowie  ‧  Casey Sander  ‧  Stephen Merchant  ‧  Sara Rue  ‧  Kara Luiz  ‧  Brian Thomas Smith  ‧  Margo Harshman  ‧  Alessandra Torresani  ‧  Matt Bennett  ‧  Keith Carradine  ‧  Laurie Metcalf  ‧  Judd Hirsch  ‧  Carol Ann Susi  ‧  Meagen Fay  ‧  Brian George  ‧  Alice Amter  ‧  Courtney Henggeler  ‧  June Squibb  ‧  Katey Sagal  ‧  Jack McBrayer  ‧  Dean Norris  ‧  Brian Posehn  ‧  Mark Harelik  ‧  Joshua Malina  ‧  Brian Patrick Wade  ‧  Kate Micucci  ‧  Regina King  ‧  Jerry O'Connell
As Selves Wil Wheaton  ‧  Mike Massimino  ‧  Stephen Hawking  ‧  Kip Thorne  ‧ Katee Sackhoff  ‧ Steve Wozniak  ‧ Buzz Aldrin  ‧ Summer Glau  ‧ James Earl Jones  ‧ Carrie Fisher  ‧  Brent Spiner  ‧ Howie Mandel  ‧ Bill Nye  ‧ George Smoot  ‧ George Takei  ‧ LeVar Burton  ‧ Neil deGrasse Tyson  ‧ Brian Greene  ‧ Charlie Sheen  ‧ Stan Lee  ‧ Adam West  ‧  Mark Hamill  ‧ Kevin Smith  ‧  William Shatner  ‧  Joe Manganiello  ‧  Kareem Abdul-Jabbar  ‧  Sarah Michelle Gellar
Crew Writers Chuck Lorre * (Creator)  ‧  Bill Prady * (Creator)  ‧  Steven Molaro *  ‧  Steve Holland *  ‧  Maria Ferrari *  ‧  Jim Reynolds *  ‧  Eric Kaplan *  ‧  Anthony Del Broccolo  ‧  Lee Aronsohn *  ‧  Dave Goetsch *  ‧  Tara Hernandez  ‧  Richard Rosenstock *
Directors Mark Cendrowski  ‧  Peter Chakos * (mainly as Editor)  ‧  Anthony Rich  ‧  James Burrows
Science consultant : David Saltzberg Director of photography : Steven V. Silver
Costume designer : Mary T. Quigley * Unit production manager : Kelly-Anne Lee *
Theme composer / performer : Barenaked Ladies Chuck Lorre Productions
also as Producer The Big Bang Theory : Full cast & crew on IMDb