The Doctor joins forces with his oldest companion on record when a military base comes under attack from sentient, dangerous waters. It may be another stand against immeasurable odds, but waiting in the wings for the Time Lord is a sign all songs must end....

During a visit to a local diner the doctor stumbles upon a mysterious alien artefact that leads him on a mission to rescue Rivesh Mantilax from the threat of the Viperox and the clutches of the American military in New Mexico.

A Dalek fleet surrounds a lone rebel ship, and only the Doctor can help them now.

The Doctor faces his greatest enemy and he needs Clara by his side. Confronted with a decision that could change the Daleks forever he is forced to examine his conscience. Will he find the answer to his question - "Am I a good man?"