Standing to inherit the family fortune once he reached his majority, orphaned teen Barnaby Harrison (Pat Cardi) was sent to live with retired intelligence officer uncle Kevin (Nigel Green) at his remote island home. Unfortunately, Kevin's got his own evil designs on his late brother's estate... and after Barnaby gets wise, a battle of wits ensues to see who gets who first. William Castle's long-sought, darkly funny take on the Rohan O'Grady novel co-stars Mary Badham, Linda Lawson. AKA: "Let's Kill Uncle, Before Uncle Kills Us." 92 min. Widescreen; Soundtrack: English; Subtitles: English; audio commentary; featurette; theatrical trailers