Lunar colonists of Moonbase Alpha are marooned in space after a nuclear explosion pushes the Moon out of its orbit and a rescue spaceship from the Earth is not what it seems to be.
|Martin Landau||-||Commander John Koenig|
|Barbara Bain||-||Dr. Helena Russell|
|Tony Anholt||-||Tony Verdeshi|
|Nick Tate||-||Alan Carter|
|Zienia Merton||-||Sandra Benes|
|Jeffery Kissoon||-||Dr. Ben Vincent|
|Toby Robins||-||Diana Morris|