"Batman Two" has to be the second Robin,
Jason Todd.
The Big Bang Theory Season 2, Episode 20
Robin Arryn is a sickly little boy.
Game of Thrones Season 4, Episode 8
I never should have hit Robin.
Game of Thrones Season 4, Episode 7
We were like
Batman and Robin.
The Big Bang Theory Season 11, Episode 17
...Southern California Robot
Fighting League Round Robin Invitational?
The Big Bang Theory Season 2, Episode 12