Actual footage of the Japanese bombing of Shanghai is used in the flashback sequence.
The shots of the building from which Charlie exits and of him entering taxi cab #610 are from "Charlie Chan in the Secret Service."
The thirty-fourth of forty-seven Charlie Chan movies.
The only Toler Chan picture produced by "Pathe' Pictures, Ltd."
This film was first telecast in New York City in 1948 (possibly 3 April 1948) on WCBS (Channel 2), in Los Angeles Monday 7 November 1949 on KTLA (Channel 5), in San Francisco Tuesday 20 December 1949 on KPIX (Channel 5), in Cincinnati Tuesday 27 December 1949 on WKRC (Channel 11), in Salt Lake City Tuesday 10 January 1950 on KSL (Channel 5), and in Boston Sunday 30 April 1950 on WNAC (Channel 7).