Continuity mistake: When Troy and Phones leave Stingray on their hoverbikes, Phones has a fish on his lap, but when Gadus watches Troy and Phones on his video screen in his submarine, the fish has suddenly disappeared.
Stingray (1964)
1 continuity mistake in Hostages Of The Deep
Starring: Lois Maxwell, Ray Barrett, Robert Easton, Don Mason
Factual error: On the map of Scotland that Troy and Phones are looking at, Glasgow is spelt "Glascow."