Doctor Who: The Sea Devils (1972) — Cast
Cast
| June Murphy | Blythe |
| Eric Mason | Smedley |
| Alec Wallis | Leningrad Telegraphist |
| Martin Boddey | Walker |
| Jon Pertwee | Doctor |
| Hugh Futcher | Hickman |
| Clive Morton | Trenchard |
| Christopher Wray | Seaman |
| Katy Manning | Marshall Grant |
| Roger Delgado | Sushi Master |
| Edwin Richfield | Captain Shaw |
| Declan Mulholland | Dick Clark |
| Brian Vaughan | Watts |
| David Griffin | Mitchell |
| Brian Justice | Castle Hechman |
| Pat Gorman | Sea |
| Terry Walsh | Barclay |
| Stanley McGeagh | Drew |
| Peter Forbes-Robertson | Sea |
| Donald Sumpter | Ridgeway |
| Royston Tickner | Robbins |
Crew
| Malcolm Clarke | Original Music Composer |
| Brian Hodgson | Special Sound Effects |
| Delia Derbyshire | Theme Song Performance |
| Mike Jefferies | Lighting Director |
| Tony Snoaden | Production Design |
| Peter Day | Visual Effects |
| Michael E. Briant | Director |
| Barry Letts | Producer |
| Malcolm Hulke | Writer |
| Peter Sargent | Camera Operator |
| Terrance Dicks | Script Editor |
| Sylvia James | Makeup Artist |
| Maggie Fletcher | Costume Design |
| Martyn Day | Editor |
| Tony Millier | Sound |
| Colin Dixon | Sound |