The peacock network has announced the 2010-11 season finale dates for their current programs. For some of the series, this will also end up being their series finale as well. If in doubt, check our list of NBC TV shows that have already been cancelled or renewed.

Here’s the season finale press release:

NBC ANNOUNCES SEASON FINALES FOR SPRING 2011

In Addition, “30 Rock” Celebrates 100th Episode with Special One-hour Edition on Thursday, April 21

UNIVERSAL CITY, Calif. – March 8, 2011 – NBC today announced many of its season finales for such series as “30 Rock,” “The Office,” “Parenthood,” “Parks and Recreation,” “Community,” “The Biggest Loser” and “The Event,” among others.

In addition, NBC’s Emmy Award-winning comedy “30 Rock” (Thursdays, 10-10:30 p.m. ET) celebrates its 100th episode with a special one-hour edition on Thursday, April 21 (10-11 p.m. ET). “30 Rock” celebrates its 100th episode as “TGS,” the show-within-the-show, faces the prospect that its 100th episode may be its last. A new corporate boss, a star in hiding, and a mind-altering gas leak may doom America’s fourth-favorite Friday night sketch comedy show.

Storyline details for each series finale will be announced later.

Following are NBC’s season finales for 2010-11 (all times ET):

MONDAY, APRIL 4
“Harry’s Law” (10-11 p.m.)

FRIDAY, APRIL 8
“Who Do You Think You Are?” (8-9 p.m.)

TUESDAY, APRIL 19
“Parenthood” (10-11 p.m.)

SUNDAY, MAY 1
“America’s Next Great Restaurant” (8-9 p.m.)

THURSDAY, MAY 5
“Perfect Couples” (8:30-9 p.m.)
“30 Rock” (10-10:30 p.m.)

THURSDAY, MAY 12
“Community” (hour-long episode from 8-9 p.m.)
“Outsourced” (10:30-11 p.m.)

MONDAY, MAY 16
“Chuck” (8-9 p.m.)

WEDNESDAY, MAY 18
“Law & Order: Special Victims Unit” (10-11 p.m.)

THURSDAY, MAY 19
“The Office” (one-hour finale from 9-10 p.m.)
“Parks and Recreation” (hour-long finale from 10-11 p.m.)

MAY 21
“Saturday Night Live” (11:30 p.m.-1 a.m.)

SUNDAY, MAY 22
“The Celebrity Apprentice” (9-11 p.m.)

MONDAY, MAY 23
“The Event” (9-10 p.m.)

TUESDAY, MAY 24
“The Biggest Loser” (9-11 p.m.)