Superman

 Superman is a  comic book superhero who appears in DC Comic books published by  DC Comics since June, 1938. Created by Jerry Siegel and  Joe Shuster in 1932, the concept was sold to Detective Comics, Inc. (later  DC Comics) in 1938 Superman has appeared in comics, radio serials, television programs, films, newspaper strips, and video games. The character's appearance is distinctive and iconic: a blue, red and yellow costume, complete with  cape, with a stylized  "S" shield on his chest.

Superman  was born   Kal-El   on the planet   Krypton, before being rocketed to   Earth   as an infant by his scientist father   Jor-El , moments before Krypton's destruction. Discovered and adopted by the Kents, the child is raised as   Clark Kent   and imbued with a strong moral compass. Very early he started to display superhuman   abilities, which upon reaching maturity he resolved to use for the benefit of humanity.

 Leonard uses Kal-El as.

 In  ''The Hamburger Postulate, they are discussing Superman's powers and that he is vulnerable to magic. ''

In The Good Guy Fluctuation, Alice aks if she can flirt with Leonard and distract him to get a rare comic book. Leonard syas that she could, but she would be usning her superpowers for eil. She replies:  I'm forbidden by my Kryptonian father to do so. refering to Superman. Ont he side, the actresses husband played Superman in Superman Returns.

In 'The Bath Item Hypothesis, they discuss what Superman does when he sweats. The scenario includes him visiting the bottled city of Kandor and engaging in a game of Kryptonian tether ball. He then has to find a Kandorian dry cleaner before he returns to Earth.

in The Justice League Recombination, Zack dresses up as Superman replacing the smaller less muscular Leonard for their Justice League of America costume team to win the Comic Book Store New Year's Eve contest. Zack enters the apartment and can't rememeber the "It's a bird..." opening. They win the contest.

In The White Asparagus Triangulation, 'Sheldon hacks into Leonard's Facebook account which is easy since he always uses the same password, Kal-el, the Kryptonian name for Superman'.

 In  The Big Bran Hypothesis, it is revealed that   Leonard  has 2,600+ comic books on  Superman.

<p style="line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;font-size:13px;"> In The Vegas Renormalization, Sheldon plans on a quiet weekend in his Fortress of Solitude when Leonard and the guys are spending the weekend in Las Vegas. Penny refers to his apartment as Superman's big ice thingy which Sheldon gets locked out of.

<p style="line-height:19.200000762939453px;color:rgb(0,0,0);font-family:sans-serif;font-size:13px;"> In The Cooper-Hofstadter Polarization, the guys were planning a Superman movie marathan and start discussing Superman with Penny. She says that she remembers Superman catching Lois Lane after she falls off the Dily Planet building. Sheldon tells her that SHe was travelling so fast that when SUperman's arms of steel caught her, she would be sliced into three equal pieces.

The Cooper-Hofstadter Polarization
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