What's On Tonight: Singing Bee, Emerald Bowl, 20/20

• At 8, NBC has a new Singing Bee, followed by a new Dateline.
• The CW has a new Smackdown! at 8.
• PBS has a new NOW at 8, followed by new episodes of Washington Week and Bill Moyers Journal.
• Disney has High School Musical 2 at 8.
• At 8:30, ESPN has The Emerald Bowl.
• At 9, Sci-Fi has the movie Elf.
• At 9:20, BBC America has a new Catherine Tate Show.
• At 10, ABC has a new 20/20.
• TCM has the movie Detective Story at 10.

Check your local TV listings for more.