Continuity mistake: When Phones is playing checkers, there are four white pieces on the board. In the next shot, there are three, and in the shot after that, there are now four again.
Stingray (1964)
1 continuity mistake in An Echo Of Danger
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."