"Experiment in Terror" (1962).
I was channel-surfing and flashed onto Turner Classic Movies (TCM) and happened upon a scene with Lee Remick's face holding the screen for a bit. For reasons I cannot fully explain Remick had always been one of MY personal luminous beauties but it was interesting that I instantly recognized her in this movie--one of her earliest starring roles--despite differences in hair color and style that she usually had later in her career.
I also happened to catch it about 20 minutes into this 2-hour movie. Usually I would have checked to see if TCM would replay the movie later and record it on my DVR that way (and would not have bothered to have watched it if I could not watch from the start), but I was quickly captured by the first 5 or so minutes I saw and just started my recording there. Fortunately the story did not seriously suffer from my missing that first portion.
The movie is based on a popular novel, "Operation Terror", that was published in 1961. The authors also wrote the screenplay.
Remick plays Kelly Sherwood, a young bank teller living in San Francisco with her younger sister Toby (played by a 19-year-old Stefanie Powers who--while generically pretty--hadn't blossomed into her full beauty yet). In the novel (which apparently was unexplained in the movie, which might be seen as measure of the book's popularity) Kelly had inherited the home of her now-dead parents and she had gotten guardianship over Toby.
For reasons not entirely clear to me (perhaps explained in the part of the movie that I missed), Kelly Sherwood is targetted by a deranged mad man, Garland Humphrey 'Red' Lynch (played by Ross Martin). She had been getting phone calls from Lynch who more threatens the life of her sister (hence the entitled terror). Kelly turns to the police who bring in the FBI led by Agent John 'Rip' Ripley (played by Glenn Ford). Lynch had concocted a scheme where Kelly would use her position as a bank teller to steal about $100,000 in cash, though exactly when the transfer from Kelly to Lynch would happen remains in the air for much of the movie (and was part of the reason why the FBI persuades Kelly to play along). Along the way Lynch contacts Toby with a story that Kelly had been seriously injured, using that to kidnap Toby to help coerce Kelly to cooperate.
Most of the movie is a police procedural with the FBI building leads and tracking down clues (which includes a seemingly unrelated murder). The movie ends with the climax taking place at a night game in Candlestick Park where (uncredited despite some close-ups of various players) the Giants were playing the LA Dodgers (the Giants won the actual game, 2-1).
Apparently this movie is a treasure trove if you are a David Lynch fan and especially a fan of his "Twin Peaks" as there are many elements of that TV series which were drawn directly from this film (including the title "Twin Peaks").
Regardless of that (since I am not much of a David Lynch fan), this movie was interesting despite being rather dated. A nice bit of film-making by director Blake Edwards.