Continuity mistake: When Mick is in the police car and there is a shot on his lap, the time on his watch reads 2:25. This episode takes place straight after Episode #2.8 and Mel stated at the wedding in that episode it was 3:15. (00:01:25)
Continuity mistake: When we find out Mel is in the helicopter, there is a shot of the villain. Judging by the distance between the villain and the roof, the helicopter is at least 10 feet off the ground. Yet when Mel knocks the villain off the ladder, he falls at least 25 feet. Maybe more. (00:41:55)
Episode #3.1 - S3-E2
Continuity mistake: When Geoff is shouting at Donald, Jacqueline and Noreen for not getting anything right at crosswords, the people who walk behind them in the background keep changing between shots. It starts when Donald says "Quite saucy for a cartoon", a female hotel worker walks past them in the background. We can see the woman walking in the background when Geoff says "You're all sitting here talking rubbish". About 2 shots later, the female worker in the background is now much closer to them but still walking off. Then in the shot where Geoff says "Course it matters!", a male hotel worker and a woman in a bikini behind them walk past them. About 3 shots later, those exact same two people are seen walking past them again.
Episode #3.6 - S3-E7
Continuity mistake: When the Garveys and Harveys go to see the mayor, they park the car and walk through the town. When they leave the mayor's office, the car is outside.
Continuity mistake: In this series, Michael is 11. However, in the first series he was 8 and each series takes place a year after the previous one, so he should be 10.