With summer break over, the students return to Greendale for their fourth year of college in this season première. While Britta tries to help Abed cope with his anxiety, Dean Pelton arranges an elaborate competition to resolve a registration mix-up. NBC/Citytv, 7 p.m.
The Nature of Things
The new documentary Shattered Ground examines the controversial process of "fracking" -- hydraulic fracturing of rock in order to extract underground natural gas deposits -- and the human-health risks posed by the practice. CBC, 8 p.m.
Bruce Campbell guest stars as President Gilchrist's brother Doug, who sparks a long-standing rivalry when he visits the White House. While Becca prepares for an interview, Skip offers a special White House tour. NBC, 8:30 p.m.
George Stroumboulopoulos: Patrick Chan, Ron James
Jay Leno: Amy Adams
David Letterman: Sally Field
Jimmy Kimmel: Dr. Phil McGraw, Tim McGraw
Craig Ferguson: Amanda Peet
Jimmy Fallon: Joel McHale
The Daily Show: Neil Barofsky
Conan O'Brien: Chris Tucker