Oh. Where's your annoying little friend
who thinks he speaks Mandarin?
The Big Bang Theory Season 1, Episode 7
(SINGING IN MANDARIN)
The Big Bang Theory Season 10, Episode 20
(SPEAKING IN MANDARIN)
The Big Bang Theory Season 1, Episode 17
(SPEAKING IN MANDARIN)
The Big Bang Theory Season 1, Episode 17
(SHELDON SPEAKING IN MANDARIN)
The Big Bang Theory Season 1, Episode 17