While Ara tries to save Polly from being turned into a Fish Person and Ben and Jamie try to escape from the mines, the Doctor discovers the full extent of Zaroff's plans.
| Title | The Underwater Menace (2) |
|---|---|
| Genres | Drama Action & Adventure Sci-Fi & Fantasy |
| Release Date | 1967-01-21 |
| Episode Runtime | 00 Hours 25 Minutes |
| Season Number | 4 |
| Episode Number | 20 |
| Production Companies | BBC |
