Plot hole: Sergeant Howie is expected to report back to the mainland on the same day he left, and since he took a valuable aircraft with him on his trip it is inconceivable that his superior officers would not come looking for him if he didn't show up. First they would try contacting him on his radio and not receiving a reply they'd send out a search party, and they would do so within twenty four hours. Missing police officers are taken very, very seriously indeed.
The Wicker Man (1973)
1 plot hole
Directed by: Robin Hardy
Starring: Christopher Lee, Britt Ekland, Diane Cilento, Edward Woodward
Other mistake: During his conversation with the landlord of the pub he ends up staying in, Sergeant Howie makes it clear that he did not intend to stay on Summerisle overnight, that he had been delayed and so needed accommodation. Makes you wonder why he packed his pyjamas. He's wearing them when Britt Ecklund does her famous naked song and dance routine, and they are not new so we know he didn't buy them that day. When he arrived he didn't even think he'd be on Summerisle for more than a few hours - we don't see him with so much as an overnight bag.
Upvote valid corrections to help move entries into the corrections section.
Suggested correction: He didn't intend to stay in there but brought them just in case. A good policeman is prepared.
What, he wore his jammies under his uniform "just in case"? He isn't carrying an overnight bag.
Sergeant Howie: What religion can they possibly be learning jumping over bonfires?
Lord Summerisle: Parthenogenesis.
Sergeant Howie: What?
Lord Summerisle: Literally, as Miss Rose would doubtless say in her assiduous way, reproduction without sexual union.
Sergeant Howie: Oh, what is all this? I mean, you've got fake biology, fake religion... Sir, have these children never heard of Jesus?
Lord Summerisle: Himself the son of a virgin, impregnated, I believe, by a ghost.
Trivia: Christopher Lee did this movie for free, and considers it one of his best roles ever.
Question: If they needed a virgin for the ritual why does Britt try to seduce him? She could have spoiled everything.
Answer: He was a devout man of faith. They had to test his virtue, to tempt him to break the ten commandments or the seven deadly sins.