As Ye Sow Tales from the Crypt : Season 5 Episode 2

A husband hires a detective to spy on his wife whom he believes is cheating on him with a priest. When he learns that he's been conned, he decides to kill him himself. That day he learns that they're was nothing going on between them and he is relieved. But he is mistaken for his wife's so called boyfriend and killed by the detective he hired.