Starring: Jan Chappell, Michael Keating, Paul Darrow, Peter Tuddenham
Continuity mistake: When Jarvik and Dayna teleport up at the end, her bracelet disappears as they materialize in the teleport bay, but is back when they reach the flight deck a few seconds later. (00:44:30)
Factual error: Tarrant is some pilot. He miraculously gets the LEM into orbit without any rocket boosters or propulsion system of any kind - and with its landing gear still attached. (00:46:50)
Trivia: The box-like entrances to the underground lair proved problematic for the Space Rat actors. When several of them were supposed to spill out on cue, the box walls and their heavy helmets prevented them from hearing the director, who repeatedly screamed "Action!" to no avail. A lone voice from inside the box eventually shouted back, "Can't hear you!"