Characters played by David Graham
Lieutenant Ninety
Professor Matthew Matic
Zoonie the Lazoon
Boris the Space Spy
Subterrain 2
2nd Floran (Mead)
Al Stomper
Alien Leader
Alien Lieutenant
Arcon Commander
Canaveral Station
Captain Catt
Caramachi
Cardre
Colonel Hudson
Doc
Doctor Baker
Emergency Call Tape
Ergon
Freighter A14
Graff
Grothan Deblis
Jinco
Jodrell Bank
Kanerik
Kudos
Magar
Major Todd
Minodor
Perfectos
Professor Al Himber
Professor Mattew 'Matt' Matic
Reld
Senta
Sergeant Mahoney
Slim Briggs
Space Station 9
Subterrain #1
Subterrain 1
Subterrain Leader
Super Solar
Tanker Pilot Joe
The Chlorophon
Volvo
Warrior Countdown
Zodan
Zoony the Lazoo
Characters played by Sylvia Anderson
Doctor Venus
Griselda the Space Spy
Jonathan Zero
Eleanor Zero
Alarm Service
Aphros
Dcotor Venus
Characters played by Paul Maxwell
Colonel Steve Zodiac
Emergency Tannoy
XL9 Pilot
Doctor Stamp
Dr. Howard Rootes
General Shan
Joe Briggs
Mrs Doughty
Okinawa Station
Research Control
Space Control
Tannoy
Technician
XL18 Pilot
XL24 Pilot
Characters played by John Bluthal
Commander Wilbur Zero
Jock Campbell
Captain Ken Johnson
Subterrain 1
1st Floran
Al
Announcer
Bizan
Captain Ken Ross
Captain Ross
Caravan Leader
Colonel Harry Denton
Commander WIlbur Zero
Commander Wilbir Zero
Deputy Sheriff Dodgem
Doctor Simpson
Edmundo
General Rossiter
Halla
IPN Newsreader
James Frazer
Jankel
Jerek
Johnny Jackson
Kazak
Kelly
Ken Ross
Major Duncan
Major Jim Ireland
Minotran
Patch
Privator
Proton
Rader
Saucer Man
Second Iceman
Snaff
Subterrain #2
Subterrain 2
Subterrain Leader
Suventan Brain
Ultra Arcon
Uncle Hans
Characters played by Gerry Anderson
Robert the Robot
Granatoid 1
Guard Robot
Judge Robot
Jury Robot 1
Jury Robot 2
Jury Robot 3
Prosecutor Robot