When Craig Pelton (Jim Rash), the dean of Greendale Community College, hears a mysterious thumping above the ceiling in Episode 1 (“Biology 101”) of the third season of this NBC (now Yahoo! Screen) sitcom, the study group explains it is student Troy Barnes’ (Donald Glover) pet monkey, which disappeared into an air-conditioning vent the previous season. But they know better. Soon, Ben Chang (Ken Jeong) bursts out of the ductwork in a terrycloth robe. Chang has been ...

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