Stuart Adrian Organ (8 November 1951 – 15 February 2024) was a British actor, best known for his role as teacher Peter Robson on the television series Grange Hill. He appeared as the character for 15 years, from 1988 to 2003, across 260 episodes.

Organ was 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.