Adapted from Nicholas Meyer's (who went on to write two of the best Star Trek films) bestselling novel, this entertaining film imagines what might have happened had Dr. Watson (Robert Duvall) convinced Sherlock Holmes (Nicol Williamson) to seek a cure for his cocaine addiction from Dr. Sigmund Freud (Alan Arkin). This meeting of the minds takes a turn into adventure when Holmes and Freud team up to solve a kidnapping mystery walongside Vanessa Redgrave, a former Freud patient cured of her own addiction, but now apparently in relapse. Laurence Olivier turns up as Professor Moriarty, who the drug-deluded Holmes takes for a criminal mastermind.