Calum Reed is a Junior Case officer at Section D. He first appeared in Episode 1 of Series 10, replacing Beth Bailey, after she was decommissioned by Erin Watts. He is a very talented and able officer, who is extremely cocky. He also thinks of himself as a joker, which sometimes impacts negatively with other people. Calum was killed by terrorists who stormed the grid in Spooks: The Greater Good, after Oliver Mace, Director General, wouldn't open the heavily protected briefing room.