The Sci Fi Channel surrenders to the millennial frenzy, providing fans with all the myriad apocalyptic visions that a 20-hour "Twilight Zone" marathon can offer, while Showtime programs several disaster films into its evening schedule. What could possibly go wrong?

1:30 AM The Outer Limits (Showtime Beyond) - Human Operators
A man enslaved by his own spaceship meets a woman and starts a revolution of sorts

2:15 AM The Outer Limits (Showtime Beyond) - The Inheritors
Super-powers from space! A random assortment of people bathe in the glow of a fallen meteor, gaining superhuman abilities therefrom.

9:00 AM The Twilight Zone (SciFi) - The Lonely
A man sentenced to a long solitary term on a prison asteroid finds companionship in the form of a feminine robot.

11:50 AM Space Marines (Showtime Beyond)
Deep-space adventure pits titular military group against rival pirates, but rarely rises above the level of pulp.

12:00 PM Armageddon (Starz)
Bruce Willis, Ben Affleck and others swagger their way through the tough business of saving the world from a big meteor.

12:30 PM The Twilight Zone (SciFi) - People Are Alike All Over
Astronaut Roddy McDowell is pleased to learn that Martians are just like Earth people, only maybe even nicer.

2:00 PM The Twilight Zone (SciFi) - The Little People
Gulliver update pits astronaut against a civilization of small but ill-tempered aliens.

2:30 PM The Twilight Zone (SciFi) - Probe 7 - Over And Out
An astronaut (Richard Basehart) returns home, only to find everyone except the lovely Antoinette Bower has been killed in a nuclear war.

6:40 PM Space Marines (Showtime Beyond)
See 11:50 a.m. listing for summary.

7:30 PM The Twilight Zone (SciFi) - The Invaders
Agnes Moorhead spends a half hour expressing her mute rage and frustration as tiny spacemen invade her rural home.

8:00 PM Star Trek: Generations (Fox)
Somewhat muddled effort teams Star Trek's Classic and Next Generations in a race to save the universe and solve the nagging mysteries behind the death of James Kirk.

8:30 PM The Twilight Zone (SciFi) - Will the Real Martian Please Stand Up
A busload of tourists come under suspicion when a UFO destroys a rural bridge. Could one be an alien scout? There's nothing up my sleeve....

9:00 PM The Twilight Zone (SciFi) - The Monsters Are Due on Maple Street
A particularly devious alien plan pits friend against friend when a suburban neighborhood is suddenly plunged into darkness. Allegorical touches make this episode especially memorable.

9:30 PM Deep Impact (Showtime)
A big comet threatens Tea Leoni, Robert Duvall and others in this film, which bears a curious resemblance to the legendary When Worlds Collide.

9:45 PM Armageddon (Starz)
See 12 p.m. listing for summary.

11:00 PM The Twilight Zone (SciFi) - To Serve Man
Big-headed aliens come to be our servants, granting us inexhaustible power, cheap interstellar travel and tasty meat patties. But what's that book they keep leafing through?