Continuity mistake: Ted and Dougal are sitting in the fourth row from the back for the journey. But when Ted presses the emergency button and after the credits, three completely different men are sitting in their seats. Everyone has been given seat numbers so they should not be sitting there.
Continuity mistake: When the commercial for the Priest chatback comes on, the phone number that's read out doesn't match the one that comes up on screen.
Cigarettes and Alcohol and Rollerblading - S2-E8
Revealing mistake: When Ted jumps onto his bed (when the nun replaced their mattresses with bricks), you can see both beds are bouncy when Ted lands on his bed and Dougal lifts back the covers on the bed half way through the episode. (00:19:20)
Old Grey Whistle Theft - S2-E4
Continuity mistake: When Ted is talking to Sergeant Hodgkins as he takes off in the helicopter outside John and Mary's shop, Ted's hair is messy and windswept. However, when he walks in the shop moments later his hair is neat and tidy.
Revealing mistake: When Henry Sellers jumps out of the window, it's apparent that it's pre-cut glass.
Visible crew/equipment: When Dougal and Jack are on the Whirly-Go-Round, a crew member's hand can be seen on the far right of the screen spinning it around.
Factual error: When Dougal and Ted enter the cockpit, the pilot points out the gauges for 'engines 1, 2 and 3'. They are in a Boeing 737 (the internal layout is that of a 737, not a BAE 146), which only has two engines.
Revealing mistake: When Ted and Dougal are climbing the big rock after seeing St. Kevin's Stump, it's so obvious that a light is being shone on them from behind. They both have shadows even though it's a dark and cloudy day.
The Plague - S2-E6
Visible crew/equipment: During the attempted rabbit race, when the cages open, you can see a crew member's arm as he tosses the rabbit out of the cage second from the left. (00:10:20)
Chirpy Burpy Cheap Sheep - S3-E2
Revealing mistake: When Fargo brings Chris the sheep to Ted's place, Jack crashes down the stairs drunk and breaks all the poles of the banister. It's obvious all the poles have been pre-cut.
Answer: Ted was using his real hands to control Father Jack's wheelchair using a remote control - the fake arms were so no-one would see him cheating.
Sierra1