"Crimson Witness" stars Peter Lawford as Ernie Mullett, who has the looks to succeed, only to watch his younger brother Farnum (Roger C. Carmel) get all the accolades. First, Ernie loses his job, his wife (Martha Hyer), and even his mistress (Julie London) to his overachieving brother, who adds to Ernie's frustration by cleverly deducing how much his older sibling had embezzled from the plant. The embittered Ernie concocts a murderous scheme to eliminate Farnum once and for all, using his latest secretary (Joanna Moore) for the perfect alibi. But alas, the best laid plans do go awry, as there is indeed a 'crimson witness' that reveals Ernie's guilt. Roger C. Carmel was best remembered for two appearances as Harcourt Fenton Mudd on the popular STAR TREK, in "Mudd's Women" and "I, Mudd." Hollywood veteran Alan Baxter plays the plant supervisor, with lovely Nancy Hsueh ("Targets") in a tiny part as his secretary.