 The submarine begins sinking as the creature in the ice escapes and runs amok. The TARDIS, which originally was on a course set for Las Vegas, materialises inside the submarine and the Doctor and Clara tumble out. The Doctor convinces Captain Zhukov (Liam Cunningham) to maneuver the submarine to the side, landing it safely and preventing it from imploding. During this the TARDIS inexplicably dematerialises. They then encounter the escaped Ice Warrior, Grand Marshal Skaldak (Spencer Wilding, voiced by Nicholas Briggs). The Doctor encourages the crew to be peaceful, but the ship's executive officer Stepashin (Tobias Menzies) knocks out Skaldak with a cattle prod, suspecting that he is not an alien but part of a Western plot. Knowing that Skaldak will desire vengeance for being attacked, the Doctor and the crew chain Skaldak, who sends out a distress call for others of his race to find him.
