The third installment of this summer’s free Screen on the Green movies, “What Ever Happened to Baby Jane?”, is scheduled for tonight. HBO describes the movie like this:

Jacked up on maximum suspense and dark humor, Joan Crawford and Bette Davis, as aging sisters and former movie stars, engage in a fierce battle of the wills. A vivid exercise in Grand Guignol, it was the first time the legendary actresses had shared the screen.

Unfortunately, the weather forecast for this evening calls for conditions “Partly cloudy with a 30 percent chance of showers and thunderstorms,” so you might want to call ahead to see whether the screening is cancelled: (877) 262-5866.

Odd black-and-white thrillers not your thing? Two more remain: “The Thin Man” on Aug. 9, and “Mr. Smith Goes to Washington” on Aug. 16.