"Cougar Town"

COMEDY. "Scrubs" reunion! Creator Bill Lawrence invites his former stars to the cul de sac tonight: Sarah Chalke returns as Bobby's new love interest; Ted (Sam Lloyd) and his a cappella group stop by Jules' home on their way to an audition at Disney World; Ken Jenkins plays Jules' dad; and Zach Braff and Robert "The Todd" Maschio appear in surprise roles.

8:30 p.m., ABC

"The River"

DRAMA. Clues lead the search party to an abandoned hospital. Who's dropping horror genre tropes in the middle of the Amazon?

9 p.m., ABC

"The Biggest Loser"

REALITY. Jessica Simpson giving away clothing and accessories from her eponymous fashion line to lucky "Losers" wouldn’t have anything to do with that other reality show premiering tonight on NBC — ahem, "Fashion Star" — now would it?

8 p.m., NBC

"My Super Psycho Sweet 16 Part 3"

MOVIE. The killer with a penchant for lavish birthday parties is back in the finale of this horror film trilogy.

10 p.m., MTV

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