Third and last film in MGM's "Nick Carter" series.
The airplane in the film, registration NC21769, is a 1939 Douglas DC-3/DST (Douglas Sleeper Transport) owned by American Airlines and named "Flagship Joplin".
Ralph Dunn is in studio records/casting call lists in the role of policeman, but he was not seen in the movie.
This film was first telecast in Los Angeles Thursday 21 March 1957 on KTTV (Channel 11), followed by Chicago 19 April 1957 on WBBM (Channel 2), by Altoona PA 3 May 1957 on WFBG (Channel 10), by Amarillo 29 July 1957 on KFDA (Channel 19), by Tucson 28 August 1957 on KVOA (Channel 4), by Philadelphia 2 September 1957 on WFIL (Channel 6), by Spokane 10 October 1957 on KHQ (Channel 6), and by San Francisco 19 February 1958 on KGO (Channel 7); in Seattle, its earliest documented airing took place 16 January 1959 on KING (Channel 5), and in New York City 14 August 1960 on WCBS (Channel 2).