Intersol were a group of beings dedicated to locking up dangerous aliens. Members included Finn Dargo, Zed and Justice.
They went after Majenta Pryce, an old enemy of theirs. They looked for her all over the galaxy, including Thinktwice prison (COMIC: Thinktwice) and Stormlight House. (COMIC: Mortal Beloved) They finally found Majenta with her friend, the Tenth Doctor, on Earth. (COMIC: Ghosts of the Northern Line)
They chased the Doctor and Majenta away from the TARDIS. They captured the Doctor, but Majenta got away. Majenta was later found by Zed, who then went on to fire at her. (COMIC: The Crimson Hand)