A friendly poker game gets out of hand, forcing Rosalie to book a controversial guest whom Walter despises; and Celia picks up a bad habit.

Complications arise after Jack and Olivia finally move in together; Grace and Cliff can't seem to agree on what kind of wedding to have.

'Where is the Doctor?' When the skies of Earth are frozen by a mysterious alien force, Clara needs her friend. But where is the Doctor, and what is he hiding from? As past deeds come back to haunt him, old enemies will come face to face, and for the Doctor and Clara, survival seems impossible.