Doctor Who: The Seeds of Doom

John Challis as Scorby Mark Jones as Arnold Keeler / Krynoid (voice) Tom Baker as The Doctor Elisabeth Sladen as Sarah Jane Smith Tony Beckley as Harrison Chase Pat Gorman as Guard Alan Chuntz as Chauffeur

George Gallaccio Production Manager Dick Mills Special Sound Effects Delia Derbyshire Theme Song Performance Robert Banks Stewart Writer Terry Walsh Fight Choreographer Robert Holmes Script Editor Philip Hinchcliffe Producer Roger Murray-Leach Production Design Graeme Harper Production Assistant Douglas Camfield Director Geoffrey Burgon Original Music Composer