10 am ET/PT | 9 am CT | 11 am MTAn explosion disintegrates the moon's dark side and hurls it, along with 311 occupants, out of Earth's orbit and into space.
11:15 am ET/PT | 10:15 am CT | 12:15 pm MTAn ancient alien queen (Margaret Leighton) persuades Koenig to allow their moon to collide with her planet.
12:30 pm ET/PT | 11:30 am CT | 1:30 pm MTKoenig appeals aliens to allow the crew to settle on their planet after the aliens' attack leaves Moonbase Alpha inhabitable.
1:45 pm ET/PT | 12:45 pm CT | 2:45 pm MTCellini (Gianni Garko) tries to vindicate himself by proving the existence of a terrifying, tentacled monster.
3 pm ET/PT | 2 pm CT | 4 pm MTBergman (Barry Morse) brainstorms to stop Moonbase Alpha from being sucked into a deadly black sun; guest Paul Jones.
4:15 pm ET/PT | 3:15 pm CT | 5:15 pm MTSimmonds (Roy Dotrice) forces Koenig (Martin Landau) to let him take the place of a dead alien on an Earthbound ship.
5:30 pm ET/PT | 4:30 pm CT | 6:30 pm MTA verbal communication from the planet Ariel destroys the crew's hopes of settling on a planet apparently similar to Earth.
6:45 pm ET/PT | 5:45 pm CT | 7:45 pm MTKoenig must decide if the crew should evacuate to an abandoned planet or escape when Moonbase Alpha's orbit ceases.
8 pm ET/PT | 7 pm CT | 9 pm MTKoenig and Helena appeal to the daughter of an alien ruler planning to use the Alphans as fuel for a biological computer.
9:15 pm ET/PT | 8:15 pm CT | 10:15 pm MTBizarre capsules circling Moonbase Alpha contain ancient killers in suspended animation.
10:30 pm ET/PT | 9:30 pm CT | 11:30 pm MTA race of superior robots forces Helena and Tony to teach it human emotions.
11:45 pm ET/PT | 10:45 pm CT | 12:45 am MTHelena, John and Alan travel back in time to plague-infested Scotland.
1 am ET/PT | 12 am CT | 2 am MTA cosmic cloud gives a crew member (Deborah Fallander) paranormal abilities; guest Jess Conrad.
2:15 am ET/PT | 1:15 am CT | 3:15 am MTKoenig must convince a powerful alien bent on destroying all visitors to set the Alphans free.
3:30 am ET/PT | 2:30 am CT | 4:30 am MTJohnny discovers the B.F. Gang, Unicorn, and takes control of Giant Robot, his ally in the fight for good over evil.