'Give me a fiver and I won't scratch your car!'...

..."another fiver and I'll stop Dan from scratching it"

28 minutes in and this line from one of the boys who ran up to Liam's car made me laugh out loud.

This film had it's moments but overall didn't impress.
I get bored with films that can't be bothered to make their characters act in reasonable ways to get out of the situation they're in.
The first time he could've proved who he was, (the night the imposter took over), he chose to hide in the bushes AS IF HE WAS THE IMPOSTER!
Talk to your wife and son while the police are there and it would be impossible for the imposter to answer even the simplest questions about their private lives.