One of the main Big Bang Theory characters, as he appeared during the first 3 seasons of the show.

From The Big Bang Theory, a brilliant astrophysicist with reputedly humorous shyness problems.

Sheldon as presented during the early seasons of The Big Bang Theory since at that point he would fit easily into a super-hero universe.

As played by Johnny Galecki during the early seasons of The Big Bang Theory.

Penny as she was during the early seasons of The Big Bang Theory.

The caustic and affect-less lady physicist in the early seasons of The Big Bang Theory.