The episode is called "The Sue Sylvester Shuffle" and they sing it at half time in the football game. It's actually a combination of Thriller and Rolling heads. (well, I think it's called rolling heads, or something like that). But if you haven't seen it, its really good
The Glee Episode In Which Finn Happens To Sing Jesse's Girl To Rachel Is Laryngitis
They sang it on the episode called On My Way
Episode 4
They are doing "Sing" in Season 2 Episode 13-Comeback
Prom queen
They sang the Thriller/Heads Will Roll mashup in the episode, "The Sue Sylvester Shuffle" (S02E11).
They do not sing it, they just perform to it. it is the episode, Season 2 Episode 11 Thriller
Season 2
Every single episode. That is somewhat of a stupid question. He is in the glee club. He must sing. lolz. :)
The Glee Episode In Which Finn Happens To Sing Jesse's Girl To Rachel Is Laryngitis
They sang it on the episode called On My Way
Episode 4
no
Special Education
Dream On.
like every...
Season 2 Episode 15: "Sexy"