Liked It Even More Than I Thought I Would - On WatchTCM.com 'Til 8/15/15
The IMDB description blurb on movie page is incorrect--really mischaracterizes the plot. I thought it would be more like Hitchcock's "Suspicion", but it's actually more complex and involved. It's not perfect, but following it was absorbing and unpredictable. "Suspicion's" tacked-on ending seemed forced and insincere, but the climax and denouement in "Undercurrent" seemed more realistic, by comparison.
I like some of the foreshadowing touches, such as when Bangs said to Ann about Garroway [something like]: "When I talked to him about the distance controller, I felt like I knew more about it than he did."
I also thought Jayne Meadows was really great, along with the other actors.
This may not be a gem, but IMO it's great to see for Hepburn and psychological drama fans. It's now running on WatchTCM.com until 8/15/15. If you like Kate and the genre, I encourage you to go there and enjoy!
BTW, "Fruit's on!" ???? (As opposed to "Soup's on"?)