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Tim Jeffery was a new science teacher at Park Vale School. In 2008, Glune Fex Fize Sharlaveer-Slam Slitheen, disguised as headmaster Greg Blakeman, took Jeffery to the new science labs where Kist Magg Thek Lutiven-Day Slitheen tapped him on the shoulder. When Jeffery turned around, Kist Magg killed him and used his skin as a disguise. (TV: Revenge of the Slitheen)