Rent Experiment in Terror (1962)

Glossy Noir (spoiler). - Experiment in Terror review by Steve

Gorgeous looking post-noir with the familiar setup of a vulnerable woman menaced by an unknown male assassin. Lee Remick is a bank worker living with her school age sister (Stefanie Powers). An assailant who can only be identified by his asthmatic breathing says they will both be brutally murdered unless the clerk robs her employer of $100,000.

And don't tell the cops... So she immediately calls the FBI… and Glenn Ford throws a huge team behind her protection, which climaxes with the wheezy psycho gunned down on the outfield of the LA Dodgers. So the first casualty of the investigation is logic.

It's unlikely the bureau would commit extensive, around the clock resources to protect a single tax payer for a crime that hasn't happened. And it's implausible that the maniac who threatens to kill her if she tells anyone, and has her entire life staked out, doesn't notice there are a dozen G Men watching every move 

Unfortunately this also undermines the suspense as it makes the stalker a bit of an idiot. However, the b&w photography is a knockout with cool camera effects and impressive locations (including the set piece at Candlestick Park). It never gets as tense as promised in the early scenes but still, it's an entertaining thriller with attractive stars.