The Wolves of Winter (comic story)

 was the sixteenth story of the Doctor Who: The Twelfth Doctor comic series, published in 2017. The story featured Bill Potts' first appearance in the ongoing Twelfth Doctor comic series, even though it was published only a few days after she left the Doctor in The Doctor Falls. It featured the return of two Martian species from Doctor Who - the Ice Warriors and the Flood.

Summary
In Bill's first comic adventure, the TARDIS crashes into the heart of a Viking camp! But this is no interactive history lesson, and it seems that a terrifying alien force has taken hold over the icy kingdom. As the snow melts, the Doctor realises that he is about to face an unwelcome face from the past...

Part 1
In the North Atlantic in the 9th century, a Viking ship sails the ocean. Sundvik, Grimvald and other Vikings sail in the ocean after a deadly battle until Sundvik orders everything to be thrown overboard so the enemy will think they have crashed into rocks and died. He questions if he should throw away “the treasure”, but ultimately refuses to give it up as they fought for it in the battle. When they reach land, they soon begin to carry out supplies, but Grimvald is uncertain about resting on the land. They soon try to seek warmth in a cave but inspect it to see if it’s safe.

Meanwhile in the TARDIS, Bill and the Doctor are going to see polar bears but the TARDIS has gone out of control. Bill and the Doctor are confused as they have gone off course and are landing.

Back on Earth, two objects appear; one object crashes into the mountain while the other one crashes into a different spot. As they settle down, the TARDIS lands and the Vikings capture them. In the cave, as Halfdan inspects the crashed object, the shadow of something stands behind him. He tries to touch the object but it shines in a bright white light, blinding him. He looks around as the shadowy creature appears closer behind him.

Outside, the Vikings are shocked by the interior of TARDIS and try to determine what god the Doctor might be. After Torkal starts to complain about her husband, Halfdan, who has not come out of the cave, the Vikings tell the Doctor about the objects that fell into the mountain, and the Doctor suggests finding Halfdan as he could possibly be in danger. The Doctor, Sundvik, Bill, Torkal, and Grimvald along with other Vikings go to find Halfdan, and Sundvik orders Asmund to split up the group and examine the other objects that crashed. The Doctor uses the sonic screwdriver to scan the area and it picks up an entity, but it is confused on whether it’s human or not. In the cave, the group light up their torches and the Doctor suggested they split up.

On the other side of the mountain, Bill and Grimvald examine the other object that crashed and see a spaceship. Grimvald tries to attack but Bill stops him and drags him away. The Doctor on the other side examines markings and symbols on the walls and has a bad feeling about the situation. He walks forward and stands in shock to see three Ice Warriors coming toward them. One of the Ice Warriors explains that they are on a dangerous mission.

Meanwhile, Bill and Grimvald explore the cave pathway but they find water everywhere and avoid it to not get wet. Bill stops and sees Halfdan pouring water out of his hands in a pool of water. Suddenly two Ice Warriors appear, water streaming from their hands and mouths, and surround Bill and Grimvald. They are infected by the Flood.

Main story

 * Twelfth Doctor
 * Bill Potts
 * Sundvik
 * Ingiga
 * Grimvald
 * Halfdan
 * Ingigeror Ragnavald
 * Torkal
 * Asmund
 * Sskoll
 * Haathi
 * Ancient One

Flashback

 * Seventh Doctor
 * Ace

Continuity

 * The Doctor tells Bill that he once fought a werewolf with the Koh-i-Noor. (TV: Tooth and Claw)
 * The Doctor laments "Vikings. Again!" He also finds himself mistaken for Odin again. (TV: The Girl Who Died)
 * The Ice Warriors carry the Flood. (TV: The Waters of Mars)
 * Bill recognises the Ice Warriors. She had described them as being like The Vikings. (TV: Empress of Mars)
 * The Doctor tells Sskoll that he is a friend of Grand Marshal Skaldak. (TV: Cold War)
 * The Doctor tells the Vikings that Ragnarok was "a long time ago" and that "they made [him] play the spoons". (TV: The Greatest Show in the Galaxy)
 * Putting on a spacesuit with the Doctor again, Bill is pleased that she does not have to pay for oxygen. (TV: Oxygen)
 * The Doctor recognises the names of the "Asmund, Grimvald, Torkal, Halfdan. Brave Viking warriors." as he comes into contact with a messenger of Fenric. (TV: The Curse of Fenric)
 * The Doctor encounters the Ancient One again. (TV: The Curse of Fenric)