It’s been 969 days since David Letterman retired from network television, but his new show on Netflix felt even longer. On Friday, as the weather in Toronto churned through multiple seasons in one day, Letterman returned to the cultural radar — a little older, a little wiser and a lot more depressing. If you watch expecting to see a topical monologue, gonzo antics and madcap interviews, prepare to be disappointed. This new Letterman isn’t here to amuse you. This new Letterman is here to bring you down. The first episode begins in his cluttered office. Letterman is slumped behind his desk. His spectacles are pushed up on his forehead. Since we last saw him on CBS in the spring of 2015, he’s joined an anti-Gillette cult. Between the dense birch woodland covering his face and his despondent mumbling, Letterman looks and sounds like a fugitive mall Santa in dire need of a Prozac milkshake.