Filming: Cast

Re-cast

Guest cast who worked well with the crew were often invited to return, so several actors can be seen in multiple roles in the series.

First seen		Also seen
	Catherine Schell Guardian Of Piri Servant of the Guardian The Metamorph/ Year 2 Maya
	Brian Blessed Death's Other Dominion Dr Cabot Rowland The Metamorph Mentor
	Isla Blair War Games Female Alien Journey To Where Carla
	Stuart Damon Matter Of Life And Death Parks The Bringers Of Wonder Guido Verdeschi
	James Snell Space Brain Cousteau Seance Spectre Stevens
	Alf Joint Breakaway Steiner Alpha Child Guard The Metamorph Overseer
	Laurence Harrington Journey To Where Jackson The Dorcons Stewart
	Glenda Allen Breakaway Eagle Stewardess End Of Eternity (and others) Main Mission Operative Death's Other Dominion Thulian Girl
	Roy Marsden The Rules Of Luton Alien Invisible Devil's Planet Crael
	David Jackson The Rules Of Luton Alien Strong The Bringers Of Wonder Alien Voice
	Terry Walsh Mark Of Archanon Rescue Eagle Pilot Journey To Where Scotsman The Seance Spectre Guard Space Warp Technician