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 mistake in An Echo Of Danger
Starring: Lois Maxwell, Ray Barrett, Robert Easton, Don Mason
Trivia: The puppet of Titan was modelled on the English actor Laurence Olivier.