Joe Mannix is invited to a party at the home of Phil Graves, with whom he served in the Army during the Korean War. Now Phil is a bank executive married to a wealthy socialite named Kathy. She confides in Joe that there have been three recent attempts on her life, including one that day when someone apparently tampered with the brakes of her car. Joe agrees to look into why someone would have tried to kill her, and pursues the identity of a mysterious "Sylvia," when he finds an expensive locket engraved with that name in Kathy Graves' car. Written by
Did You Know?
The interior of the Graves' house is the same set used for The Brady Bunch
(1969) (with just a few minor changes). The exterior shots are from a different house, however. See more
There are several errors before this one gets to the intro music. First off, when Jessica walks to the E-type she drops the racquet and can of balls in the passenger seat - the right seat. (The car was made for America, not a UK one shipped over). She then walks around to the left seat and gets in. But what you see in the mirror of the guy watching from the truck is her walking to the right side of the car and getting in and the steering wheel is there. When it switches back to her she's pulling out sitting on the left. The white car can be seen briefly in both shots and it is on her left, but is to the right in the mirror shot. So they didn't mix in an English drive car, just somehow they reversed the film for the mirror footage. See more