John Carpenter's Tales of Science Fiction: Interference Pattern #3

After murdering Nestor, Alt-David shows up at David's home, while David is left to deal with the police… and what looks like him on the security tape. Meanwhile, Camille is confused by the sight of her grizzled husband and his strange behavior, until our David returns home, leaving her completely flabbergasted. The two Davids finally meet, and after a tense face-off, they realize they need to fix this problem and an uneasy truce is formed… for now.