Apart from one small scene at the movie's beginning, Tippi Hedren is never seen sharing a frame with another actor or actress. Her dialogue was recorded separately and was randomly cut into the film. The producers simply needed another name to sell this picture and Hedren was available for a comparatively small salary.
As this film was made on such a shoestring budget, Tippi Hedren not only had to do her own hair and make-up but also had to bring her private wardrobe to the set.