Eddie ConstantineProfessor Katrin SchaakeProfessor's Wife Rainer LanghansScientist / Escritor Rainer Werner FassbinderCourier Hannes FuchsAlien / Escritor Peter MolandEscritor / Co-Director Ulli Lommel(uncredited) / Director / Escritor Barbara Constantine(uncredited) Tanya Constantine(uncredited) / Supervisor de guion Ulli Lommel(uncredited) / Director / Escritor Rainer LanghansScientist / Escritor Herbert J. BambergerEscritor / Productor / Editor Peter MolandEscritor / Co-Director Hannes FuchsAlien / Escritor Rolf ZaunerProduction Design Lothar E. StickelbrucksDirector Of Photography Jochen HaydrichCostume Design Reinhard JahnAsistente de dirección Tanya Constantine(uncredited) / Supervisor de guion Holger MünzerCompositor de música original Heinz GobrechtUnit Manager Horst DyckhoffProduction Assistant H.J. BeaumarchaisJefe de producción 
