The Joker. From Batman.
The Big Bang Theory Season 3, Episode 14
Here's the
Batman 612
The Big Bang Theory Season 5, Episode 5
- (IN DEEP VOICE) I'm Batman.
- Damn it, Sheldon.
The Big Bang Theory Season 2, Episode 1
Batman is a man who dresses up like a bat.
The Big Bang Theory Season 9, Episode 21
Batman.
The Big Bang Theory Season 6, Episode 4