The Ellen DeGeneres Show

(3 p.m., NBC10) - Singer Justin Bieber; James Blunt performs.

The Oprah Winfrey Show (4 p.m., 6ABC) - After 25 years of history-making TV, Oprah hosts the finale.

Entertainment Tonight (7 p.m., CBS3) - American Idol; Dancing With the Stars.

The Insider (7:30 p.m., CBS3) - The Oprah Winfrey Show finale; American Idol.

The Big Bang Theory (8 p.m., CBS3) - Sheldon (Jim Parsons) asks Penny (Kaley Cuoco) to give him a few acting lessons, hoping it will make him more effective as a teacher. Raj (Kunal Nayyar) is having fantasies about a girl - unfortunately (cue the Cars song), she's his best friend's girl. Johnny Galecki also stars in "The Thespian Catalyst."

The Middle (8 p.m., 6ABC) - Three days are left in the school year, which means some last-minute scrambling for the Heck kids.

American Idol (8 p.m., Fox29) - The top 13 finalists reunite for the last time before host Ryan Seacrest reveals the identity of the 10th American Idol. Viewers will be kept in suspense for a couple of hours, though, as the season finale always contains plenty of filler - entertaining filler, admittedly - with the big announcement coming in the episode's final moments.

Modern Family (9 p.m., 6ABC) - It's Jay's (Ed O'Neill) birthday, and he'd love to spend it quietly fishing on the lake, but his family has other plans.

Late Show With David Letterman (11:35 p.m., CBS3) - Piedmont Bird Callers; Kevin Bacon; Augustana performs.

The Tonight Show With Jay Leno (11:35 p.m., NBC10) - Chaz Bono; animal expert Brady Barr; Foster the People.

Jimmy Kimmel Live (Midnight, 6ABC) - Jesse Tyler Ferguson; Sarah Vowell; Maybach Music Group.

The Late Late Show With Craig Ferguson (12:37 a.m., CBS3) - Comic Norm Macdonald; journalist Julie McCarthy.

Late Night With Jimmy Fallon (12:37 a.m., NBC10) - Lucy Liu; Justin Tuck; Wavy Gravy; David Crosby and Graham Nash.