The Fifth Doctor, Tegan and Turlough arrive on Sea Base 4, a nuclear warhead station under the sea that has some very nasty neighbours.
Cast
Peter Davison
The Doctor
Janet Fielding
Tegan Jovanka
Mark Strickson
Vislor Turlough
Tom Adams
Vorshak
Ian McCulloch
Nilson
Ingrid Pitt
Solow
Nigel Humphreys
Bulic
Tara Ward
Preston
Martin Neil
Maddox
Nitza Shaul
Karina
James Coombes
Paroli
Norman Comer
Icthar
Stuart Blake
Scibus
Vincent Brimble
Tarpok
Christopher Farries
Sauvix
Tai Ling
Seabase Crewmember
Crew
Pennant Roberts
Director
Johnny Byrne
Writer
Eric Saward
Script Editor
Hugh Parson
Editor
John Nathan-Turner
Producer
June Collins
Production Assistant
Norma Flint
Production Assistant
Tony Burrough
Production Design
Alastair Mitchell
Camera Supervisor
Alec Wheal
Camera Supervisor
Judy Pepperdine
Costume Design
Chris Holcombe
Sound
Martin Ridout
Sound
Peter Smee
Lighting Director
Mat Irvine
Visual Effects Designer
Dave Chapman
Visual Effects
Mitch Mitchell
Visual Effects
Jonathan Gibbs
Original Music Composer
Richard Gregory
Props, Modeling
Alan Arbuthnott
Technical Supervisor
Dick Mills
Special Sound Effects
Michael Darbon
Production Manager
Peter Howell
Theme Song Performance
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