The Doctor faces the Chameleon’s Director who reveals his plan to abduct 50,000 humans.
The Doctor worries about Jamie who is a prisoner of the Chameleons.
To stop Samantha from boarding the Chameleon Tours flight, Jamie takes her place.
With the support of Inspector Crossland, the Doctor pursues his investigations.
Polly returns but claims not to know the Doctor or Jamie, then Ben vanishes too.
The TARDIS arrives at Gatwick airport in 1966 and Polly witnesses a murder.