Tuesday's TV Highlights: Couples dance on 'So You Think You Can Dance'
TOP 20 DANCERS: Ten couples perform and compete on 'So You Think You Can Dance' 8 p.m. Fox.
Explorer: The new episode "Mystery of the Disembodied Feet" investigates cases of severed human feet that have washed ashore around British Columbia, Canada, over the course of a year (7 and 10 p.m. National Geographic).
It's the Great Pumpkin, Charlie Brown: Linus sits in his pumpkin patch waiting for the Santa-like Great Pumpkin to reward him with Halloween largesse in this classic special (8 p.m. ABC).
BET Hip-Hop Awards 2009: Top hip-hop artists are honored in the fourth annual ceremony. Mike Epps hosts (8 p.m. BET).
Modern Marvels: This new episode takes a behind-the-scenes look at Knott's Berry Farm's annual "Knott's Scarry Farm" event (8 p.m. History).
Dancing With the Stars: Taylor Swift performs and two couples are eliminated (9 p.m. ABC).
Frontline: In the new episode "Close to Home," producer Ofra Bikel examines how the middle class is doing in the current recession from the perspectives of people she has come to know at the hair salon she has frequented for the last 20 years (9 p.m. KCET).
The Universe: Computer graphics help illustrate the difference between the phenomena of pulsars and quasars (9 p.m. History).
Monica: Still Standing: This new, unscripted series premieres as recording artist Monica works on her fifth studio album (10 p.m. BET).
Flipping Out: The show's principal figures -- obsessive-compulsive house flipper Jeff Lewis, assistant Jenni Pulos, housekeeper Zoila Chavez and Jeff's ex-boyfriend -- and possibly ex-business partner -- Ryan Brown reunite to discuss the events of Season 3 (10 p.m. Bravo).
The Little Couple: In the season premiere the couple make an appointment to test Jen's lung capacity, which is important in determining her ability to carry a baby (10 p.m. TLC).
Michael Jackson: This Is It Movie Special: This new special gives viewers an early look at the new film (8:30 p.m. MTV).
Scream 2009: Fans and celebrities gather at the Greek Theatre in Los Angeles for the fourth annual celebration of creative talent in the horror, sci-fi, fantasy and comic genres (10 p.m. Spike).
High Noon: Gary Cooper gives an Oscar-winning performance as a western lawman forced to take on an old nemesis single-handedly when the townspeople turn yellow. Grace Kelly, Lon Chaney Jr., Lloyd Bridges and Ian MacDonald also star in this 1952 classic (3:30 p.m. TCM).
Poltergeist: In 1982, the same year that Steven Spielberg was charming us with "E.T. the Extra-Terrestrial," he was scaring us out of our wits with this suburban horror film starring Craig T. Nelson, JoBeth Williams, Heather O'Rourke and Dominique Dunne (5 p.m. TCM).
NBA basketball: The Boston Celtics visit the Cleveland Cavaliers (4:30 p.m. TNT); the Clippers visit the Lakers (7:30 p.m. TNT).
College football: East Carolina at Memphis (5 p.m. ESPN2).
Photo: Michael Becker / Fox