Ooh, look, a new Batman belt buckle.
The Big Bang Theory Season 2, Episode 20
Is he still wearing the Batman suit
under the Man-Bat suit?
The Big Bang Theory Season 9, Episode 21
The Joker. From Batman.
The Big Bang Theory Season 3, Episode 14
...I could be Batman.
The Big Bang Theory Season 2, Episode 1
Batman utility belt.
The Big Bang Theory Season 5, Episode 19