Although it is credited to Karl Brown, the script was actually recycled from Monogram's Lionel Atwill vehicle The Sphinx (1933).
The title was recycled from an earlier Bela Lugosi film. It had been the working title for Invisible Ghost (1941), which was released the previous year.
The earliest documented telecasts of this film occurred in New York City Sunday 23 May 1948 on WCBS (Channel 2), in Los Angeles Sunday 29 May 1949 on KTLA (Channel 5), in Cincinnati Friday 15 July 1949 on WKRC (Channel 11), and in San Francisco Wednesday 14 December 1949 on KRON (Channel 4).