Tuesday on TV

Jefferson (6 and 9 p.m., History): Fascinating two-hour biography of Thomas Jefferson.

Wipeout (7 p.m., Ch. 4): Contestants have to dodge ketchup and mustard in the Wipeout Weenies.

Warehouse 13 (7 and 9 p.m., Syfy): Plans for a relaxing weekend change when artifacts interfere.

HawthoRNe (7 and 9 p.m., TNT): There's a construction accident at the hospital.

Shaq Vs, (8 p.m., Ch. 4): Shaq golfs against Charles Barkley and enters a hot-dog-eating contest.

America's Got Talent (8 p.m., Ch. 5): The first group of semifinalists performs.

Memphis Beat (8 and 10 p.m., TNT): A man with a bullet wound also has amnesia.

If God is Willing and the Creek Don't Rise (10 p.m., HBO): The conclusion of Spike Lee's two-part documentary about New Orleans since Hurricane Katrina hit.

White Collar (10 p.m., USA): An FBI agent is accused of selling the locations of witnesses.

Rescue Me (11 p.m., FX): Tommy and Sheila finally see their relationship for what it is.

Covert Affairs (11 p.m., USA): A hacker shuts down communications systems in Washington, D.C.

Louie (midnight, FX): Louie goes to the dentist.