What to Watch Tonight

Jon Hamm is Don Draper on AMC's "Mad Men"

For a Sunday night in August, there sure are a lot of new shows on tonight. The first big one is the new “Big Brother” episode at 8 pm/7pm central on CBS, which will probably feature the antics of the last few days. The second is the season three premiere of “Mad Men” on AMC 10 pm/9 pm central. The third is “Kourtney and Khloe Take Miami” on E!, which should get some decent ratings now that Kourtney has announced her pregnancy by Scott Disick. More suggestions after the jump.

ABC: all-new “Who Wants to be a Millionaire,” “Shark Tank” and “Defying Gravity” from 8-11 pm/7-10 pm central

NBC: all-new “Merlin” and a rerun of the SNL Presidential Bash of 2008

CBS: all-new “Big Brother” and “There Goes the Neighborhood”

AMC: all-new “Mad Men” at 10 pm/9 pm central, with a repeat directly following the premiere

E!: “Kourtney and Khloe Take Miami” debuts at 10 pm/9 pm central on E!

TNT: two showings of football movie “We Are Marshall,” the story of Marshall University rebuilding after the plane crash that killed nearly their entire football team

ESPN: Sunday Night Baseball features the Phillies at the Braves

MTV: all-new “Randy Jackson Presents” and “P-Diddy’s Starmaker” at 8:30 pm/7:30 central

VH1: all-new “My Antonio,” whatever that is

History: all-new “Ice Road Truckers” and “Pawn Stars”

Discovery: all-new “Raging Planet: Hurricanes” and “Raging Planet: Floods”