Roger Delgado
The Master
Katy Manning
Jo Grant
Edwin Richfield
Captain Hart
Clive Morton
Trenchard
June Murphy
3rd Officer Jane Blythe
Donald Sumpter
Commander RidgewayDavid Griffin
Lt. Commander Mitchell
Hugh Futcher
Hickman
The Master joins forces with The Sea Devils to take over the world, unless The Doctor and The Royal Navy can stop them.
