All three starring women were over 65 when this was made, and they all lived for considerable periods of time after it. Sybil Thorndike died at 93 in 1976, Estelle Winwood died at 101 in 1984, and Kathleen Harrison died at 103 in 1995.
The island of Easdale is in Scotland, not Ireland.
The helicopter used to search for the ladies is a Westland Dragonfly.
Olive McFarland's debut.