while Leonard
Skypes with his GIRLFRIEND.
The Big Bang Theory Season 5, Episode 2
...about the possibility
of building a better GIRLFRIEND.
The Big Bang Theory Season 3, Episode 3
Maybe we should've asked if we could go
dancing with her and her GIRLFRIEND.
The Big Bang Theory Season 1, Episode 7
Who, by the way,
also has a GIRLFRIEND.
The Big Bang Theory Season 4, Episode 5
Don't call her my GIRLFRIEND.
The Big Bang Theory Season 6, Episode 24