The cast and crew had mixed memories of "Cast a Dark Shadow."

Dirk Bogarde felt it was a "good" film, but he was unhappy that it had failed at the box office. He recalled that Margaret Lockwood gave one of her best performances, but her status as a star in the British film industry was waning due to the fact that she had appeared in several recent movies that were flops.
He persuaded Lockwood to appear in the movie.

Margaret Lockwood reflected that after some initial hesitation she was glad to have accepted the role. She also wondered what it did to benefit her career? She did not work in another feature film until twenty years later. She continued in theater and television productions, but never regained the mass popularity that she enjoyed during the 1940s.

Director Lewis Gilbert remembered that "Cast a Dark Shadow" made a modest profit, but called the decision to promote the picture as a Margaret Lockwood vehicle was "counterproductive." In terms of ticket sales, Gilbert's memory was correct while Bogarde was mistaken. The film did manage to turn a profit,

The cinematographer of "Cast a Dark Shadow," Jack Asher, later distinguished himself by helping to make several of the most stylish horror features produced by Hammer Films and directed by Terence Fisher.