4/6 To stop Samantha from boarding the Chameleon Tours flight, Jamie takes her place.
3/6 With the support of Inspector Crossland, the Doctor pursues his investigations.
2/6 Polly returns but claims not to know the Doctor or Jamie, then Ben vanishes too...
1/6 The TARDIS arrives at Gatwick airport in 1966 and Polly witnesses a murder.
4/4 The Doctor and Polly discover that the Macra control the colony…