When Mr. Copper is talking about how what they're doing could get them ten years in jail, the cut on his forehead changes sides.
The man and woman either side of the Glamorous Man during the Champagne-cork scene switch sides.
When The Doctor and Astrid are transported back to the ship and some crew members approach the group, Astrid hides behind The Doctor. On the next shot in a close up, Astrid hides again.
When the Doctor first looks out the porthole to see that the ship is orbiting Earth, the planet is on the ship's starboard side. The intro plays and it shows the ship in orbit again but now the planet is on the port side.
When the meteors are shown they have 'tails'. In space the meteor should be just a chunk of rock. They only develop 'tails' when going through the atmosphere. It's comets that have 'tails' due to the thawing of the ice.
When the door to the bridge is closed to stop the Host, he actually uses the whistle control to shut it.
Foon admits that she spent 5000 credits to win the tickets and says they'll never be able to pay that off. Later, the Doctor tells Mr Copper that £1 million is equal to 50 million credits. This means that 50 credits equals £1, so 5000 credits is only £100.
The Doctor says "Take me to your leader". He then remarks, "I've always wanted to say that." He already has said that, as Christopher Eccleston, in Aliens of London (2005).