Despite having a major role as Detective Inspector Campbell's (Gordon Jackson) right-hand man Sergeant Harvey, Sam Kydd is missing from both the opening titles and end credits cast list.
Miss Shepherd says that she was reading a thriller called "Death in Seven Hours". This is the novel on which this film is based.
Opening credits: All characters and events in this film are fictitious. Any similarity to actual events, or persons, living or dead, is purely coincidental.