Ruby and the Doctor return to the Elysium, where Ruby fetches a gold pendant from her cabin for use as a weapon. Brack then tries to confront her, but she flees, convinced that he's in league with the Cybermen. The Doctor heads to the bridge, to convince Captain Trench of the danger he faces, but Trench doesn’t believe him until it's too late. The iceberg which Brack had carved into the shape of Straker's head turns out to be a Cyberman base, and the Cybermen dock the iceberg with the Elysium and board. Much to the Doctor's and Ruby's surprise, Brack and Straker attempt to drive the Cybermen off with the ice-carving laser, but the Cybermen are armed with nerve gas and soon the passengers are unable to resist them. Brack breaks his leg falling from the deck, and the Cybermen leave him where he lies. The Doctor and Ruby try to avoid the Cybermen, but Ruby is pursued into the hold, where she accidentally knocks over the “PANAMA” crates and discovers that they contain hundreds of mannequin arms. The Cyberman tries to follow her through the pistons of the ship's engines, but falls out of step and is crushed. Ruby is reunited with the Doctor in the ship's ballroom, where the Wizard of Oz cabaret has been interrupted by the arrival of more than one Tin Man. There, they find Brack's secret project behind the curtains, a stage prop for the cabaret, nothing to do with the Cybermen at all.