At 108 minutes, the Hammer production "Stop Me Before I Kill!" is one of the longest movies that they made. It's a rather meaty story, and serves as a major showcase for three of its main actors, but isn't that satisfying overall. Written by producer & director Val Guest and author Ronald Scott Thorn, based on the latters' novel "The Full Treatment", it tells of a British race car driver, Alan Colby (Ronald Lewis), and his lovely Italian wife Denise (Diane Cilento), vacationing in France some time after a bad traffic accident in which the other driver had died. Alan fears for his sanity, and is now worried that he may have developed homicidal intentions towards his wife. They make the acquaintance of an eminent French psychiatrist, David Prade (Claude Dauphin), who attempts to help Alan deal with his issues.
This could and should have been a little more involving, as the premise is not bad and it's entertaining enough in watching psychiatric methods being employed. But the script by Guest and Thorn is so heavily laden with dialogue that it barely gives the story (not to mention the actors) a chance to breathe. It does have some good dialogue, and starts to go for more interesting visuals in its final third. The on location shooting, of course, is impeccable, which, along with the Megascope photography, helps to make the picture pleasant enough to look at. (To say nothing of sexy blonde Cilento). Dauphin, Cilento, and Lewis are all fine, and they're ably supported by Francoise Rosay as Prades' mother, and Bernard Braden as Colby's friend Harry. The filmmaking is pretty slick; it's just too bad that the scenario can't generate more suspense.
Certainly worth a look for devoted Hammer followers, but not one of their best.
Six out of 10.