Stuart Organ is a British actor. He is best known for his portrayal of the character Mr. Robson in the children's television drama Grange Hill. Organ portrayed the series' longest-serving teacher, arriving in 1988 as the new head of PE. In 1998 he finally landed the headmaster's job, but left the series in 2003 soon after production of Grange Hill transferred to Liverpool. His regular voice work includes lip-synching and dubbing cartoons and video games, including Star Wars: The Old Republic.