The Doctor investigates disappearances in New York at the height of the depression in the 1930s. Nefarious Pig Men linger in the sewers and the Daleks prepare an audacious plan at the top of the Empire State Building

The newly-created Dalek-human hybrid, and the other three members of the Cult of Skaro launch an attack on Hooverville, along with their Pig Slaves. The Doctor, Martha, and Frank manage to escape, but discover that the Daleks' plan involving the Empire State Building...