Grey's Anatomy, Fringe, and 30 Rock

Season 5 finale, 8 p.m, FOX


In the Season 5 finale, the team investigates the death of a hoarder and newly-married Angela (Michaela Conlin) receives a visit from her father, ZZ Top's Billy F. Gibbons, who guest-stars as himself.

Season 2 finale, 8:30 p.m., NBC

Parks and Recreation

As Season 2 comes to a close, Ben (Adam Scott) tries to prevent Leslie (Amy Poehler) from organizing a children's concert and Mark (Paul Schneider) makes some major life decisions. Rob Lowe also guest-stars.

Season 6 finale, 9 p.m., ABC

Grey's Anatomy

Mandy Moore guest-stars in the two-hour Season 6 finale, in which a major disaster at Seattle Grace puts Meredith (Ellen Pompeo) and Cristina's (Sandra Oh) surgical skills to the ultimate test.

Season 2 finale, 9 p.m., FOX


In the second half of the Season 2 finale, Olivia (Anna Torv) and Walter (John Noble) are still "over there"—and make some life-changing decisions to prevent the two universes from colliding. Oh, and I'm pretty sure that Walter and William Bell (Leonard Nimoy) have some big-ass showdown.

Season 4 finale, 9:30 p.m., NBC

30 Rock

Liz (Tina Fey) attends the weddings of Floyd (Jason Sudeikis), Cerie (Katrina Bowden), and Grizz (Grizz Chapman), all while trying to find the man of her dreams. Meanwhile, Jack (Alec Baldwin) actually has to decide between Nancy (Julianne Moore) and Avery (Elizabeth Banks). Plus, Matt Damon guest-stars!

12:35 a.m., NBC

Late Night with Jimmy Fallon

Jimmy welcomes SNL's Will Forte and The Big Bang Theory's Jim Parsons.

Also on the airwaves...
FlashForward, 8 p.m., ABC
Community, Season 1 finale, 8 p.m., NBC
CSI, Season 10 finale, 9 p.m., CBS
The Office, Season 6 finale, 9 p.m., NBC
The Mentalist, Season 2 finale, 10 p.m., CBS
The Marriage Ref, Season 1 finale, 10 p.m., NBC
The Real Housewives of New York City, 10 p.m., BRAVO
MLB Baseball: Cubs v. Phillies
NHL Hockey Playoffs: Flyers v. Canadiens

What are you watching tonight?

Follow writer Stefanie Lee on Twitter: @StefAtTVDotCom

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