Impulse, is a tawdry, low-budget exploitation film about a maniacal murderer possessed by evil demons. Matt Stone (William Shatner) is a paranoid, con-man and gigolo who seduces lonely women and then bilks them of their savings using an investment scam. Then he kills them. When he begins seeing an attractive widow, her daughter Tina (Kim Nicholas) becomes suspicious of his motives. Then Tina herself is in danger. Impulse, directed by William Grefe, is the absolute nadir of Shatner's acting career and consequently has become a camp, cult classic and a must see for fans of Shatner. All others beware.
~ Linda Rasmussen, All Movie Guide