Matthew Perry, Justin Kirk Matthew Perry, Justin Kirk

NBC will give viewers commercial-free sneak peeks of two new fall shows — Go On and Animal Practice — on August 8 and August 12, respectively, the network announced Thursday.

Fall Preview: Get your first look at all the new shows!

The Matthew Perry-led comedy Go On will premiere following coverage of the 2012 Summer Olympic Games, and Animal Practice, starring Justin Kirk, will premiere after the Olympics' closing ceremonies.Among the other noteworthy premieres, NBC's singing competition series The Voice will kick off its first-ever fall cycle with a two hour premiere on September 10 at 8/7. And although NBC is launching several new comedies early, the network is holding back returning comedies 30 Rock, Community and Whitney until October.

Fall TV: See what's on when and against what with our day-by-day grid

See all the premiere dates below.Wednesday, August 8(Following the Olympic Games) Go On*Sunday, August 12(Following Olympics Closing Ceremonies) Animal Practice*Monday, August 138/7c: Stars Earn Stripes*10/9c: GrimmWednesday, September 57:30/6:30c NFL Kickoff Special 20128:30/7:30c Sunday Night FootballSunday, September 97/6c:  Football Night in America8:15/7:15c: Sunday Night FootballMonday, September 108/7c: The VoiceTuesday, September 119/8c: Go On* (regular time)9:30/8:30c: The New Normal*10/9c: Parenthood
Wednesday, September 12
10/9c: Guys with Kids* (sneak peek following America's Got Talent)Friday, Sept 149/8c: Grimm
Monday, September 17
10/9c: The Revolution*Thursday, September 208:30/7:30c: Up All Night9/8c: The Office9:30/8:30c: Parks and Rec
Wednesday, September 268/7c: Animal Practice* (regular time)8:30/7:30c: Guys With Kids* (regular time)9/8c: Law & Order: SVUThursday, October 48/7c: 30 RockWednesday, October 1010/9c: Chicago Fire*
Friday, October 198/7c: Whitney8:30/7:30c: Community

*
denotes new series