Today on TV

The Superstars (7 p.m., Ch. 4): The competition continues.

Great American Road Trip (7 p.m., Ch. 5): This new reality/competition series features seven "unique and eccentric" families traveling historic Route 66 in RVs, competing in "comical, clever challenges" that will lead to one winning $100,000. Haven't seen this one, so you're on your own here.

America's Got Talent (8 p.m., Ch. 5): The auditions continue.

Nova scienceNOW (8 p.m., Ch. 7): Segments on the Kepler telescope; genetic key to autism; and using computers to authenticate paintings.

Saving Grace (8 and 10 p.m., TNT): In the midst of an investigation into a brutal home invasion, an angel tries to tempt Grace away from Earl.

The Cleaner (11 p.m., A&E): William is hired to help a pregnant girl who is addicted to meth.

Rescue Me (11 p.m., FX): Franco steps into the ring; Sean reveals his financial scheme.