TiVo Guide Week of September 13, 2010 *spoiler alert*

"Parenthood" In the second-season premiere, Adam is stressed out by his family and demanding boss (William Baldwin). Elsewhere, Zeek and Joel try to fix a leak in the barn; Crosby gets ready to see Jasmine and Jabbar; Haddie learns to drive; Max endures a crisis; and Sarah searches for her niche. Tuesday at 10 on NBC.

"America's Got Talent" The winning act is revealed in the Season 5 finale, which features performances by an array of Las Vegas and Hollywood stars. Wednesday at 8 on NBC.

"It's Always Sunny in Philadelphia" Season 6 premiere: Mac defends traditional marriage, while the rest of the gang reap the rewards of wedded bliss. Thursday at 10 on FX.

"Star Wars: The Clone Wars" In the Season 3 opener, five clone cadets try to complete their training regimen but must first learn to work together. Later, Anakin and Obi-Wan defend Kamino and its clone factories against the Separatists. Friday at 9 on Cartoon.

"25 Greatest TV Characters of All Time" A countdown of TV's most memorable characters. Included: Lucy Ricardo, Archie Bunker and Carrie Bradshaw, as well as animated characters. Sunday at 8 on TV Guide Network.

"Boardwalk Empire" In the Martin Scorsese-directed premiere of this drama set in Atlantic City at the dawn of Prohibition, political boss Enoch "Nucky" Thompson (Steve Buscemi) brokers a sale of illegal booze for visiting New York gangster Arnold Rothstein, and takes an interest in a local housewife with an abusive husband. Meanwhile, World War I veteran and Thompson protégé Jimmy Darmody (Michael Pitt) meets a hoodlum from Chicago named Al Capone. Sunday at 9 on HBO.