Designer Raymond Cusick recalls his work on The Keys of Marinus, and discusses the challenges that this story held, with its weekly changes of location and inventive set-pieces.
Himself
The Doctor (archive footage)
Ian Chesterton (archive footage)
Barbara Wright (archive footage)
Susan Foreman (archive footage)
Arbitan (archive footage)
Sabetha (archive footage)
Altos (archive footage)
