(The DOCTOR turns to JAMIE.) ANN DAVIDSON: (Giving her a ticket.) BLADE: Carry on. CHAMELEON TOURS' KIOSK
TANNOY: Chameleon Youth Tours announce the departure of their flight number Four-One-Nine to Rome. JAMIE: And where's that? SPENCER: Yes, indeed. There we are.
Plan: A: Spencer; Q: Who tries to kill the Doctor, Jamie and Sam? A: Sam; Q: Who decides to book a ticket on one of Chameleon Tours' flights? A: Chameleon Tours; Q: Who is hiding something from the Doctor, Jamie and Sam? Summary: When Spencer attempts to kill them, the Doctor, Jamie and Sam become convinced Chameleon Tours are hiding something and Sam decides to book a ticket on one of their flights.