The Premiere Cut of the film featured a different, more extensive ending which was cut out in the theatrical version. This Original Ending was unseen until the 2004 DVD Release by Universum Film.
Jürgen Roland (who had previously directed two Edgar Wallace Movies himself) was brought in to finish principal photography when the original director, Joseph von Baky, fell heavily ill during production.
Marianne Koch was considered for the part of Margaret Reedle.