I am trying to find the name of an old black-and-white movie. I saw it when I was a kid about 30-35 years ago! I don't know who's in it, and all I remember is the last scene: A woman is being held behind bars in the basement of a house. The woman who put her there has placed a bomb in every clock in the house. The man who both women want has decided he wants the woman who is locked up, so the bomber (a blonde, I seem to recall) has set the clocks ticking down. The woman in the basement is telling the man where all of the clocks in the house are so he can run and disarm them. It all comes down to finding the last clock. The man finds the clock (an alarm clock) but he either doesn't know how to disarm it or doesn't have time to disarm it, so he runs to a window, throws the clock as hard as he can, and it happens to land between the feet of the bomber-woman. She is standing in the rain, holding an umbrella, waiting for the house to explode, and doesn't seem to notice the clock has landed at her feet. Then, the clock explodes. PLEASE HELP ME FIND THIS MOVIE!

The Old Dark House

Thank you for the quick response! I looked it up, and it is definitely the right movie. I appreciate the help.

You're welcome.