Kist Magg Thek Lutiven-Day Slitheen

Kist Mag Thay Lutiven-Day Slitheen was a member of the family Slitheen. He has a son (who remains unnamed). Kist Mag Thay, his son and another Slitheen named Glune Fex Fize Sharlaveer-Slam Slitheen invaded a school in London and Kist Mag Thay disguised himself as Mr Jeffery. Together, with other family members all over the world they planned to turn off the Sun. But Sarah Jane Smith intervened and Kist Mag Thay was killed by the failing technology. (SJA: Revenge of the Slitheen)