Lie to Me, Last Comic Standing, and The Secret Life of the American Teenager

8 p.m., FOX

Lie to Me

It's been a long six-month hibernation, but the human lie detectors are back! In the summer premiere, Lightman (Tim Roth) suspects that a psychology graduate student is actually a psychopath, and Loker (Brendan Hines) and Torres (Monica Raymund) investigate a teacher's (Howard Hesseman) UFO claim.

Season 7 premiere, 8 p.m., NBC

Last Comic Standing

The Office's Craig Robinson hosts the seventh season of this stand-up comedy competition, featuring judges Andy Kindler, Natasha Liggero and Greg Giraldo. Robinson is also hosting the Hip-Hop Honors at 9 p.m. on VH1, but something tells me that he taped at least one of these events beforehand.

Season 3 premiere, 8 p.m., ABC Family

The Secret Life of the American Teenager

Ashley (India Eisley) talks to her doctor about birth control and Ben's (Kenny Baumann) behavior confuses Amy (Shailene Woodley).

9 p.m., FOX

The Good Guys

Dan (Bradley Whitford) and Jack (Colin Hanks) track a group of thieves who steal vintage cars. What Dan's mustache is up to, however, is another story.

Series premiere, 10 p.m., ANIMAL

Last American Cowboy

This new reality show follows the lives of three ranching families in Montana. And guess what? It's calving season!

12:35 a.m., NBC

Late Night with Jimmy Fallon

Jimmy welcomes Molly Shannon and Glee's Chris Colfer. (If you're more of a Mercedes fan, Amber Riley is on Lopez Tonight at 11 p.m. on TBS.)

Also on the airwaves...
The Bachelorette, 8 p.m., ABC
Cake Boss, 9 & 9:30 p.m., TLC
True Beauty, 10 p.m., ABC
Persons Unknown, Series premiere, 10 p.m., NBC
The Real Housewives of New Jersey, 10 p.m., BRAVO
Pawn Stars, 10 & 10:30 p.m., HIST
Dance Your Ass Off, 10 p.m., OXYGEN
Saving Grace, 10 p.m., TNT
MLB Baseball: Padres v. Phillies

What are you watching tonight?

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Follow TV.com writer Stefanie Lee on Twitter: @StefAtTVDotCom