(A crocodile of school children are being escorted by two women teachers. The TARDIS is standing nearby and the Doctor is sitting on a swing in the designated play area, using his mobile phone.)

TEACHER: Come on, kids, no pushing!

CLARA [OC]: Hi, this is Clara Oswald. I'm probably on the Tube or in outer space. Leave a message! (beep)

DOCTOR: Hello, it's Doctor Disco. I'm in the twenty first century. I don't know what month. I'm staking out some of the most dangerous creatures imaginable.

(Two little girls stop and stare at him.)

DOCTOR: Operating under deep cover. Trying not to attract suspicion. Give me a call, Clara. Nightmare Scenario. I'm worried.

(He follows the little girls to the monkey bars.)

DOCTOR: Okay. Hey, Monster High and Cinderella. Down off the monkey bars. Listen to me. We've got to talk.