Devil Doll 1964 is a British horror film about an evil ventriloquist, The Great Vorelli, and his dummy Hugo directed by Lindsay Shonteff.
At the following show, Vorelli asks a member of his audience onto the stage. When no one volunteers, English encourages Horn to go up. Vorelli succeeds in hypnotizing her and making her dance the Twist with an uncredited Ray Landor, expert Twist dancer. Horn is left partially hypnotized by Vorelli, who recognizes her name as that of a wealthy heiress. English, inexplicably wanting to do a story on Vorelli because of his unique powers, gets Horn to invite Vorelli to her aunts charity ball. Vorelli has already decided to go to the ball, having read about it in the newspaper and seeing it as an opportunity to seduce the rich Horn.The night of the ball, Vorelli stays at Horns aunts mansion. He calls Horn to his bedroom where he seduces her after using his power to subdue her will. In the meantime, Hugo miraculously appears in Englishs room and asks English to help him. Hugo repeats 1948 and Berlin before disappearing. The next day, English begins an investigation into Vorellis past. Meanwhile, Horn falls into a semicoma that the doctors cannot penetrate. In one lucid moment, she tells English that He keeps calling me and Make him stop. It is not clear whether English makes the connection. ........
Source: Wikipedia