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Stephen Lee Viksten (July 19, 1960 – June 23, 2014) was an American television writer and voice actor who was best known for voicing the character Oskar Kokoshka on the Nickelodeon animated series Hey Arnold!. Viksten also wrote multiple episodes of Hey Arnold, Rugrats, Recess, Duckman and The Simpsons. Viksten's sole contribution to the latter, season 22's "Homer Scissorhands", was his final writing credit before his death. Wikipedia