“Listen” is episode four of season eight of the new Doctor Who.
“Listen” opens with the Doctor talking to himself. Except that he has a theory that, when we talk to ourselves, we actually know that we are not alone, and that there is something else in the room with us. Something we can never, ever see.
Clara is on a date with her teacher colleague, Dan Pink, the former soldier who is a bit sensitive about something. Do we care about him yet? Well, maybe we will by the end of this episode.
The Doctor picks her up and starts expounding on his theory to her. Which theory is actually pretty creepy. So the Doctor wants her help in proving this theory.
Possibly the creepiest episode since “Blink”. Until the ending, anyway.