Victor, who "has been coming here for years", and is very familiar with all of the townsfolk, is introduced to Ben (the morning after the ceilidh) as though a stranger (and even though Ben was present during Victor's song).
When Happer leaves his penthouse office to enter his adjacent apartment, he uses a remote control to reveal the apartment's single doorway entrance. Yet in the next sequence, Happer is shown cooking in the kitchen, with the same entrance in the background - double-doored.
When Happer leaves Knox's hut, Knox says, "Goodnight." As Happer strolls the beach past the helicopter, the sun's shadow falls directly in front of him. He is immediately joined by MacIntyre and Olsen, but the shadows on their bodies indicate that shot was taken at a different time.
Just before the first RAF Jaguar flies over the car, raindrops can be seen in the inside of the open door as they are feeding the rabbit. They stand up to look at the jet, and the car's roof has no raindrops on it.
When Mac and Danny stop the car to check out the thump, the car's lights are off. When they get back into the car and decide to stay put for the night due to the fog, the lights are on, and Mac asks Danny to turn them off.