Community Exclusive: John Oliver Returns for... Big Butt Mystery!?

The Greendale campus is in chaos this week on Community when a buttcrack bandit invades, dropping coins down victims' pants. (Hey, could be worse, right?)

Not trusting Dean Pelton's (Jim Rash) investigatory skill, Jeff (Joel McHale) and Annie (Alison Brie) conduct their own interrogation of the staff, including the delightful John Oliver, who will reprise his role as Prof. Ian Duncan.

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"You know a lot of things are shaking up this season. Obliviously some cast members are leaving, so it's great to have him come back and just have this really strong comedic presence," Brie says in this exclusive behind-the-scenes look at Thursday's episode.

"It feels fantastic to be back," Oliver shares. "If I knew as a child that that would be an option as an adult to spend a week's life on Earth making a show about dropping quarters into a--cracks then I would have been confused because I didn't know what a quarter was back then, of course. We use the pence system, but otherwise I would have thought that sounds good."

To see what else Oliver, Brie and Joel McHale have to say about Thursday's episode watch the full video below.

Community airs Thursdays at 8/7c on NBC.