Howard and Bernadette

Howard and Bernadette  have been dating since The Creepy Candy Coating Corollary and is now engaged.

Season 3

 * The Creepy Candy Coating Corollary- Howard was introduced to Bernadette via Penny. At first, she and Howard did not get along on their date, as they appeared to have nothing in common. However, when they found out they both had overbearing mothers they immediately felt a connection.
 * The Vengeance Formulation- Bernadette asks Howard for a commitment in their relationship, After deliberating Howard proposes to Bernadette but she rejects. Their relationship resumed after Howard asked for a second change when he sang his own rendition of Bernadette by The Four Tops.
 * The Plimpton Stimulation- Howard announces that Bernadette and him have broken up a few weeks ago. Howard claims that he did not tell anyone because he was waiting for the "right time".

Season 4

 * The Hot Troll Deviation- It is revealed that Howard and Bernadette broke up because she caught Howard having cyber-sex on World Of Wacraft with Glycenda the Troll. Howard convinces Penny to help him to get Bernadette to talk to him. After he apologizes they got back together.
 * The Cohabitation Formulation- After they had sexual intercourse, Bernadette asked Howard to stay over. But he refused as his mother required his assistance in the morning. Later that episode, Bernadette decided to tackle Howard's issue; his overbearing mother , she asked him to choose between her or his mother. He ended up choosing her, but soon after she realized he was deeply reliant on his mother as well.
 * The Herb Garden Germination- Rumors about Bernadette’s intention of breaking up with Howard start spreading amongst their social group. However, Howard who was left in the dark, is thinking of proposing to Bernadette. When Howard finally pop the question, Bernadette accepted.