Trivia: Torchwood: Children of Earth
- Hey, It's That Guy!: John Frobisher is played by PETER. FUCKING. CAPALDI. You might know him better as Lobus Caecilius or the Twelfth Doctor.
- What Could Have Been: Martha Jones and Mickey Smith were supposed to appear in Children of Earth, but Freema Agyeman was busy, as was Noel Clarke for a film shoot. The two are explained away as being on their honeymoon (though we don't know it's them married until Doctor Who's The End of Time- we are led to think it was Tom Milligan up to the reveal that Mickey really married Martha) and unable to help the team.