Thomas Knight began acting at the West End, appearing in productions of Medea, The Full Monty and Chitty Chitty Bang Bang. He is best known, however, for his role on The Sarah Jane Adventures; he also appeared in its mother series, Doctor Who. Other television appearances include Casualty and The Impressionists.
- Dialogue for One (2005)
- Runaways (2007)
- Pudding Bowl (2007)
- The Silver Key (2009)
- The Sarah Jane Adventures (regular, 2007-2010)
- Doctor Who (recurring, 2008-2010)