SPOTLIGHT

'American Idol'

7 p.m. on Fox

"Idol" moves ahead, as the remaining semifinalists are announced.

 

NEW TONIGHT

'The Big Bang Theory'

7 p.m. on CBS

When Sheldon has to postpone a haircut, he re-evaluates his whole routine.

 

'Parks and Recreation'

7:30 p.m. on NBC

Leslie throws a party after she realizes everyone has forgotten Jerry's (Jim O'Heir) birthday.

 

'The Vampire Diaries'

8 p.m. on the CW

Elena, Bonnie and Matt surprise Caroline (Candice Accola) with a birthday party.

 

'Grey's Anatomy'

8 p.m. on ABC

As Adele's Alzheimer's worsens, Richard considers a move. Summer Glau guests.

 

'The Office'

8 p.m. on NBC

In Florida, Dwight competes with Packer (David Koechner) to become Nellie's (Catherine Tate) vice president.

 

'Project Runway All Stars'

8 p.m. on Lifetime

The designers are called on to find inspiration in flags.

 

'The Mentalist'

9 p.m. on CBS

Malcolm McDowell returns as cult leader Bret Stiles, now suspected of murder.

 

'Private Practice'

9 p.m. on ABC

Sam (Taye Diggs) struggles to care for his sister, Corinne (Anika Noni Rose); Cooper (Paul Adelstein) resists when Charlotte urges him to get outside help with Erica.