Lifeforce - Die tödliche Bedrohung
Steve RailsbackCol. Tom Carlsen
Peter FirthCol. Colin Caine
Frank FinlayDr. Hans Fallada
Mathilda MaySpace Girl
Patrick StewartDr. Armstrong
Michael GothardDr. Bukovsky
Nicholas BallRoger Derebridge
Aubrey MorrisSir Percy Heseltine
Nancy PaulEllen Donaldson
John HallamLamson- JJohn KeeganGuard
Chris JaggerFirst Vampire- BBill MalinSecond Vampire
Derek BenfieldPhysician
Jerome WillisPathologist
John WoodnuttMetallurgist- JJohn Forbes-RobertsonThe Minister
Peter PorteousPrime Minister- KKatherine SchofieldPrime Minister's Secretary
- OOwen HolderFirst Scientist
- JJamie RobertsRawlings
- RRussell SommersNavigation Officer
- PPaul CooperSecond Guard
- PPatrick ConnorFatherly Guard
Sidney KeanBrash Guard- CChris SullivanKelly
- MMilton Cadman1st Soldier
- RRupert Baker2nd Soldier
- GGary HildrethPolice Surgeon
- EEdward EvansDoctor
- NNicholas DonnellyPolice Inspector
- PPeter LovstromFirst Boy in Park
Julian FirthSecond Boy in Park
Carl RiggFirst Radar Technician- GGeoffrey FrederickCommunications Officer
- DDavid English1st Crewperson
Emma Jacobs2nd Crewperson- MMichael John Paliotti3rd Crewperson
- BBrian Carroll4th Crewperson
Richard OldfieldMission Leader- CChristopher BarrTrajectory Officer
Burnell TuckerNASA Man- TThom Booker1st NASA Officer
Michael Fitzpatrick2nd NASA Officer- RRichard D. SharpShip Crewman
- JJohn GolightlyColonel
- WWilliam LindsayColonel's Aide
- DDavid BeckettSoldier
Sidney LivingstoneNed Price- KKen ParrySykes
- JJohn EdmundsBBC Commentator
- HHaydn WoodHelicopter Pilot
John LarroquetteNarrator (uncredited)- JJames PayneNASA Man (uncredited)
Stuart MilliganNASA Technician (uncredited)- BBarrie HollandLondon Man (uncredited)
Kerry ShaleRawlins (voice) (uncredited)- MMike MungarvanPoliceman (uncredited)
Guy StandevenTechnician (uncredited)
Elizabeth Heery2nd Radar Technician