This was originally intended to be the first in a series of films based on the Mrs. Pym novels of Nigel Morland; the author would write 22 Palmyra Pym thrillers between 1935-61.
Although Mrs. Pym's first name is never heard, it is Palmyra.
The final film of Robert English.
This is one of about three dozen British films picked up by CBS in 1949 for television presentation; in Los Angeles its initial telecast took place Saturday 13 August 1949 on KTTV (Channel 11) and in New York City Saturday 15 October 1949 on WCBS (Channel 2). Since this film had never been shown theatrically in the USA, these telecasts also constituted its USA premiere showings.