A police box on the runway. COMMANDANT: You say this girl actually witnessed a murder? JEAN: The chief of police. Polly's nowhere to be seen. She can identify you.
Plan: A: the runway; Q: Where does the TARDIS materialize at Gatwick Airport? A: Polly; Q: Who witnesses a murder at Gatwick Airport? Summary: The TARDIS materialises on the runway of Gatwick Airport, where Polly witnesses a murder only to be kidnapped before she can report it.