Toby O'Brien clued me in to this episode of Kraft Suspense Theater, which was based on a novel (The Drowner) by John D. MacDonald. The story follows the novel pretty well, so if you've read the book, you know how it turns out. I suspect that even if you haven't read the book, you'll know how it turns out before you get to the end. It's pretty entertaining, though.
Aldo Ray plays Sam Kimber, a businessman who's in love with another man's wife. The wife drowns (but we know it's murder), and Clu Gulagher shows up to investigate. He's a private eye hired by the murdered woman's sister (Ellen Burstyn, billed as Ellen McRae), who doesn't believe the story about the drowning. Kimber's been hiding money from the IRS with the dead woman, and the money's disappeared. He's naturally the chief suspect. Tina Louise plays his secretary, and Whit Bissell plays his accountant.
Everything is worked out quickly as the episode is only 45 minutes long. I suspect something was cut, but maybe not. There's on pretty good line. Gulagher asks Louise how tall she is, and she responds, "With heels?" "With anybody," Gulagher says. I don't know if that's in the novel.