Tales from the Crypt (1989)

S5E1 Death of Some Salesmen / As Ye Sow / Forever Ambergris

A cunning con artist specializes in selling fake tombstones, but he soon discovers that some of his unsuspecting clients have hidden fortunes in their basements. After marrying one victim's daughter, he murders her parents, only to face an unexpected twist when he explores the cellar. In another tale, a husband hires a detective to investigate his wife, believing she’s involved with a priest. Upon realizing his mistake, he is relieved, but tragically, he’s mistaken for the supposed lover and is killed by the very detective he hired. Meanwhile, Dalton, a veteran combat photographer, becomes enamored with his friend’s wife. After being sent into a dangerous disease outbreak zone, he returns changed and writes a letter revealing the betrayal, as both his wife and friend also fall ill.