Former Doctor Who showrunner Steven Moffat breaks down why he feels the modern era of the sci-fi series has seen many of its companions face tragic but definitive endings. The writer first joined production on the television series with season 1 of the revival, and would take over from initial showrunner Russell T Davies in helming the show in 2010 until 2017. Moffat returned to writing for Doctor Who upon Davies returning to the role of showrunner, penning "Boom" for Doctor Who season 14 and the 2024 Christmas special "Joy to the World".