Terry Potter

as Ozzy / 3rd Class Alien

Pete O'Herne

as Barry / 3rd Class Alien

Craig Smith

as Giles / 3rd Class Alien

Mike Minett

as Frank / 3rd Class Alien

Peter Jackson

as Derek / Robert

Doug Wren

as Alien Leader

Peter Vere-Jones

as Alien Leader (voice)

Ken Hammon

as 3rd Class Alien