Leonard, I didn't know
you played the CELLO.
The Big Bang Theory Season 1, Episode 5
You mean my CELLO.
The Big Bang Theory Season 1, Episode 5
clearly you've never
seen me play the CELLO.
The Big Bang Theory Season 7, Episode 6
When I broke up with Penny,
I got back into my CELLO...
The Big Bang Theory Season 4, Episode 3
Little snarky there,
Cello Lessons.
The Big Bang Theory Season 5, Episode 12