The positronic brain of robot RB-34 (Herbie) has an unforeseen 'extra': he can read human thoughts. So his take on the First Law of Robotics is unorthodox: he tells human beings only what he believes will not hurt their feelings. Can renowned robopsychologist Dr. Susan Calvin 'fix' RB-34? Or are there areas of her own psyche where she would rather not hear the truth?

Paul Chapman
as Milton Ashe

Ian Ogilvy
as Herbie, RB34

Hamilton Dyce
as Dr. Lanning

Wendy Gifford
as Dr. Susan Calvin

Gerald Sim
as Dr. Bogert

Robert James
as Kelvin Brooke

Edwin Richfield
as Jamieson

Roy Hanlon
as Hargreaves

Jenny Russell
as Mary Curl

Anna Perry
as Brooke's Secretary