Skadi

 was one of the Kolothos Hunt, a group of hunter outlaws from the planet Kolothos.

The hunters collected various exotic alien creatures to release onto alien worlds, ready to be hunted. In 1972, one of them was released on Trafalgar Square on Earth and pursued by their hounds. As part of the hunt, Skadi killed a policeman that got between her and the small alien creature. The Twelfth Doctor incapacitated the hounds with a dog whistle, and after Skadi's husband Broteas killed another policeman, the Doctor knocked out Broteas.

Leaving Broteas behind to get arrested, Skadi murdered the creature she was hunting, and Skadi and her son Tarquel kidnapped Jess and Maxwell Collins aboard their spaceship. She showed Jess her menagerie, and was contacted by the Doctor, who offered himself and Broteas in exchange for the release of Jess and Maxwell, and then leaving Earth. She broke this promise, and sent the hounds after the Doctor and Jess in Epping Forest. The Doctor knocked the hounds down using a reprogrammed metal horse belonging to Broteas, and Jess did the same to Skadi after she tried to kill the Doctor. Maxwell appeared to threaten Tarquel, forcing Skadi to drop her sword and subsequently be arrested by DCI Jack Hayes. Tarquel then took Skadi and Broteas out of Hayes' custody to bring them to justice on Kolothos for their killings. (COMIC: Bloodsport)