Tom Quinn is a fictional character in the BBC espionage television series Spooks (called MI-5 in the United States), which follows the exploits of Section D, a counter-terrorism division of MI5. He is portrayed by British actor Matthew Macfadyen. In the first two series, Tom is the chief of Section D. The character was in the first and second episode of the third series but was decommissioned as a result of sabotaging an operation.