This Hammer film production is a surprisingly frightening horror thriller and a hoot-fest for lovers of over-the-top acting. Young Pat Carroll (Stefanie Powers) goes to the home of her dead fiancé to meet his beloved mother, Mrs. Trefoile (Tallulah Bankhead). There, she discovers that Mrs. Trefoile is not the loving mother she had anticipated, but rather a grieving psychopath who blames Pat for the death of her son. Tallulah Bankhead, in her last film, has never been know for her subtle acting, but in this she lets go of all restraint and gives a performance equal to that of Bette Davis in What Ever Happened to Baby Jane? Her maniacal intensity is comic, camp, and surprisingly effective. Stefanie Powers, who underplays her role, is a great contrast as the puzzled and then terrified Pat. This movie is a must-see for all lovers of camp horror movies or fans of the memorable Tallulah Bankhead. Die! Die! My Darling! was also released as Fanatic.
~ Linda Rasmussen, All Movie Guide