Considered an unofficial sequel to the previous year's box-office success The Uninvited (1944); both are mystery stories that share actress Gail Russell, director Lewis Allen and several other crew members, but are otherwise unrelated in story or characters. The film posters compared the two films and proclaimed: "More Exciting Than The Uninvited" and "Menace More Deadly Than The Uninvited!"
The Ethel Lina White novel on which this film was based, Midnight House (U.S. title: Her Heart in Her Throat), was first published in 1941.
One of over 700 Paramount Productions, filmed between 1929 and 1949, which were sold to MCA/Universal in 1958 for television distribution, and have been owned and controlled by Universal ever since. A popular local favorite, it was first telecast in Omaha Thursday 4 December 1958 on KETV (Channel 7), in Philadelphia 6 January 1959 on WCAU (Channel 10), in Los Angeles 7 January 1959 on KNXT (Channel 2), in Chicago 8 January 1959 on WBBM (Channel 2), in Minneapolis 10 January 1959 on WCTN (Channel 11), in New York City 27 January 1959 on WCBS (Channel 2), in Phoenix 7 February 1959 on KVAR (Channel 12), in Milwaukee 20 April 1959 on WITI (Channel 6), in Seattle 6 May 1959 on KIRO (Channel 7), in Detroit 23 September 1959 on WJBK (Channel 2), in Asheville 19 November 1959 on WLOS (Channel 13) and in Johnstown 27 November 1959 on WJAC (Channel 6).
Final film of Phyllis Brooks.