Peter Davison
The Doctor
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The Fifth Doctor, Tegan and Turlough arrive on Sea Base 4, a nuclear warhead station under the sea that has some very nasty neighbours.
Top Billed Cast
| Release Date | 1984-01-13 |
|---|---|
| Runtime | 1h 40m |
| Director | Pennant Roberts |
| Producer | John Nathan-Turner |
| Writers | Johnny Byrne, Eric Saward |
