Eddie ConstantineProfessor Katrin SchaakeProfessor's Wife Rainer LanghansScientist / Writer Rainer Werner FassbinderCourier Hannes FuchsAlien / Writer Peter MolandWriter / Co-Director Ulli Lommel(uncredited) / Director / Writer Barbara Constantine(uncredited) Tanya Constantine(uncredited) / Script Supervisor Ulli Lommel(uncredited) / Director / Writer Peter MolandWriter / Co-Director Hannes FuchsAlien / Writer Rainer LanghansScientist / Writer Herbert J. BambergerWriter / Producer / Editor Rolf ZaunerProduction Design Lothar E. StickelbrucksDirector Of Photography Jochen HaydrichCostume Design Reinhard JahnAssistant Director Tanya Constantine(uncredited) / Script Supervisor Holger MünzerOriginal Music Composer Heinz GobrechtUnit Manager Horst DyckhoffProduction Assistant H.J. BeaumarchaisLine Producer 
