Plot hole: Old Ash travels back in time to 1982 to snatch the Necronomicon before Young Ash ever finds it (which should, presumably, erase all of the evil events from the original Evil Dead film right up to the present). Upon escaping the cabin, Old Ash finds that the timeline has self-corrected, and his amputated right hand has reappeared on his arm. But he is still in the 1980s. If the timeline had truly self-corrected, then Old Ash's car, his friends, and he himself would have vanished instantly from the 1980s, because the purpose of their mission never existed.Charles Austin Miller
Deliberate mistake: Inside the home that has been infested with Evil, the state police confront a possessed girl who attacks them. After some futile gunfire, the possessed girl is still standing. The female officer goes for her backup gun, which for some reason is a small over-and-under Derringer (meaning she has two shots maximum). She ends up firing the Derringer five times in just a few seconds, with explosive damage and without reloading. Director Sam Raimi probably staged the 5 gunshots on purpose, knowing that a two-round Derringer was a ridiculously-limited piece of firepower. Raimi probably did this as a tongue-in-cheek tribute to Ash's bottomless double-barrelled shotgun from Evil Dead 2 and Army of Darkness.Charles Austin Miller
Trivia: While the film contains numerous references to "The Evil Dead" and "Evil Dead II: Dead by Dawn", it contains virtually no overt references to the third "Evil Dead" film, "Army of Darkness." This is due to an issue with the rights to the third film, as they are owned by a different company than the series and the first two films.