Last Rites(1999)

“A killer's time is up. But fate will reset the clock.”

A man is executed in the electric chair for having killed several women, but due to lightning striking a transformer at the moment of execution, he survives. As soon as he's well, however, they plan to electrocute him again, but now he has become a changed man and the female criminal psychiatrist attributes it to the electrocution wiping out certain brain cells.