The Sea Devils, Part Four

Jon Pertwee The Third Doctor Katy Manning Jo Grant Nicholas Courtney Alistair Gordon Lethbridge-Stewart Donald Sumpter Commander Ridgeway Clive Morton Trenchard Edwin Richfield Captain Hart SM Stanley McGeagh Castle Guard Drew Peter Forbes-Robertson Chief Sea Devil AW Alec Wallis Ldg. Telegraphist Bowman JC John Caesar C.P.O. Myers David Griffin Lt. Commander Mitchell HF Hugh Futcher Hickman MB Martin Boddey Walker NS Neil Seiler Radio Operator BJ Brian Justice Castle Guard Wilson CB Colin Bell C.P.O. Summers Eric Mason C.P.O. Smedley RR Rex Rowland A/B Girton JM June Murphy 3rd Officer Jane Blythe Terry Walsh Castle Guard Barclay Christopher Wray Ldg. Seaman Lovell NA Norman Atkyns Rear Admiral Pat Gorman Sea Devil BV Brian Vaughan Lt. Commander Watts RT Royston Tickner Robbins DM Declan Mulholland Clark