When the slurry lorry first pulls away, you can clearly see it's not Tom driving.
When father Jack's wheelchair rolls up the magic road, some sort of cable or wire can be seen on the ground pulling him along.
When Dougal and Ted are standing by the rock before they see the couple on the other side, they clearly have two shadows even though it's a cloudy day.
When Ted mistakes the mobile home for the "caravan" they were supposed to occupy, he is confronted by a man who clearly stepped from the shower- as he is toweling himself off. If the mobile home is equipped with a functioning bathroom, why is the wife using the campground toilet later in the episode?