Do you remember that Leonard Hofstadter loved Superman, Dell computers and that he'd never celebrated his birthday? The Big Bang Theory remains one of the longest-running sitcoms in history.

The Big Bang Theory is officially ending after ... there is one character I really couldn’t get on board with. Leonard Leakey Hofstadter. Yes, he’s insecure, we get it… (Picture: CBS ...

Leonard Hofstadter was never the flashiest guy in the room but he still managed to rattle Penny more than once in The Big Bang Theory.

It may not sound young, but Leonard was years ahead of his peers. Johnny Galecki as Leoanrd Hofstadter and Jim Parsons as Sheldon Cooper in ‘The Big Bang Theory’ | Cliff Lipson/CBS via Getty ...

The Big Bang Theory fans showed their love for the show with their reactions to this season 1 moment featuring Penny (Kaley ...

When we first meet The Big Bang Theory's Leonard Hofstadter he is a self-proclaimed nerdy scientist who instantly falls in love with his new neighbour Penny. Though it seems unlikely that budding ...

The Big Bang Theory is not just one of the longest-running TV comedies in US television history—it’s a pop-culture phenomenon ...

Despite being a pretty wholesome show, The Big Bang Theory's 12-season run features its fair share of controversial episodes.