"The Big Bang Theory" featured a ton of guest stars — just the list of "Star Trek" veterans alone is pretty long, in fact. One of those "Star Trek" favorites just so happens to be Wil Wheaton ...

Many guest stars have solidified their ... "The Planetarium Collision." Wil Wheaton appears 17 times on "The Big Bang Theory.

So I'm giving a big shout-out to The Wil ... where Wheaton played Ensign Wesley Crusher, the boy genius son of the ship's doctor. The other group would be fans of The Big Bang Theory, where ...

Then, at 18, Wheaton suddenly left Hollywood. He explains why he left and came back and how he came to play his evil self on The Big Bang Theory. Produced by Will Wei. Camera by Devan Joseph.