Melissa Gilbert and her off-screen husband Bo Brinkman star as a married couple in USA Network's "The Lookalike," an original movie in which a woman just getting over the death of her daughter in a car accident is driven to the brink of insanity after spotting an exact lookalike of the girl. The premiere of this psychological thriller is Wednesday at 9.

The child's mother also happens to be a dead ringer for Gilbert's character, who after a year in psychotherapy finds herself thinking she may have met her psychic double -- a doppleganger. Her superstitious boss, played by Thaao Penghlis, is sympathetic, unlike her over-protective mother, Diane Ladd.

The strange circumstances leave her almost totally unstrung before her boss and therapist discover the lookalikes and uncover a horrible secret. The question is, is it too late to tell her?

Repeats: Dec. 16 at 7 p.m. and Dec. 22 at 2 p.m.

Sunday on Showtime at 9 p.m. a new "Showtime 30-Minute Movie" trilogy produced by the "Discovery Program," a non-profit organization that offers industry professionals the opportunity to direct their first short-length feature film.

The three films are:

"The Jogger": Terry Quinn stars as the guy who runs the same path every morning, but one day his casual jog turns into a bizarre race with a stranger. Winner of a Gold Award for best live action at the Houston International Film Festival.

"Little Feet": Ed Gale, Ellen Greene and Evan Richards star in a story about college days in the early 1970s and a freshman who finds himself with a dwarf confined to a wheelchair as a roommate and learns a lot about true friendship.

"The Heart of the Deal": A young accountant is confronted by two mysterious strangers who request from him an even stranger donation -- his wife's heart. Stars Ruben Blades, James Karen and Vincent Spano.

The series is hosted by Rob Reiner. Repeats: Wednesday at 10 p.m.

Sunday on HBO at 9 p.m. "The Tragedy of Flight 103: The Inside Story" stars Ned Beatty, Peter Boyle, Vincent Gardenia, Timothy West and Michael Wincott in a drama that reconstructs the behind-the-scenes activity of airline officials, international police and terrorists prior to the Dec. 21, 1988, bombing of Pan Am 103 over Lockerbie, Scotland.

Encores: Wednesday at 8 p.m., Saturday at 11 p.m., Dec. 17 at 10 a.m., Dec. 20 at 2:30 p.m. and Dec. 23 at 4:55 a.m.

Wednesday on Bravo at 9 p.m. The Royal Ballet performs Peter Wright's production of the spirited holiday classic "The Nutcracker." Choreography is by Wright and Lev Ivanov with Gennady Rozhdestvensky conducting The Orchestra of the Royal Opera House. Lesley Collier is the Sugar Plum Fairy, Anthony Dowell is The Prince, Julie Rose is Clara and Guy Niblett is the Nutcracker. Repeats at 2 a.m., and Dec. 25 at 10 p.m. and 3 a.m. "Nureyev's Nutcracker" is scheduled for Christmas Eve at 8 p.m.