TiVo Guide Week of April 4, 2011 *spoiler alert*

"American Idol" The finalists perform songs from the Rock and Roll Hall of Fame. Guitar virtuoso Jeff Beck accompanies the contestants. Wednesday at 8 on Fox.

"Breaking In" In the premiere of this comedy about a high-tech security firm that protects clients by exposing their vulnerabilities, Contra boss Oz (Christian Slater) blackmails a perpetual college student-cum-computer hacker (Bret Harrison) to be his intern, but the newcomer is out of his league when he's tasked with stealing an expensive car from a dealer, and adjusting to an office full of eccentrics doesn't make life any easier. Adam Sandler is an executive producer. Wednesday at 9:30 on Fox.

"The Big Bang Theory" Sheldon and Amy spread gossip as part of an experiment; and Howard and Bernadette's relationship gets serious. Physicist Brian Greene has a cameo. Thursday at 8 on CBS.

"Merlin" Conclusion. The Season 3 finale finds Camelot crumbling under the control of Queen Morgana and Morgause's immortal army. While Arthur, Lancelot, Elyan and Percival prepare a counterattack, Merlin rushes to retrieve the Excalibur sword from the Lake of Avalon. Friday at 10 on Syfy.