History of character has not yet been written.
- Leadership: When his school bus was attacked William was able to quickly take charge and help the other children escape.
- Science: He won second place at the school's science fair for cloning a plant.
- In a flash forward William revealed that he had a boyfriend.
- 24 Appearances of William Clayton (Arrow)
- 1 Images featuring William Clayton (Arrow)
- Quotations by or about William Clayton (Arrow)
- Character Gallery: William Clayton (Arrow)
|Arrow and Flash television series. This template will categorize articles that include it into Category:Arrow (TV Series) Characters.|