Sheila Dunn

as Frau Gehart (1 episode)

as Mrs Proudfoot (voice) (1 episode), as Carol (1 episode)

as Ward Sister (4 episodes)

as Hospital Sister (1 episode)

as Mrs. Tyson

as Mrs. Tyson (1 episode)

as Petra Williams / Dr Petra Williams

as Phone Operator

as Blossom Lefervre

as Petra Williams (5 episodes), as Dr. Petra Williams (2 episodes), as Computer (voice) (1 episode), as Telephone Operator (voice) (1 episode), as Telephone Operator (1 episode)