2. To This Day, No One Knows What Happened To Daniels
Brooklyn Nine-Nine's pilot episode contains a perplexing mystery. When Captain Holt asks for Jeffords' opinion of the squad the Sergeant points out Scully, Hitchcock, and a woman named Daniels as being good for nothing except the morning's coffee. To this day, no one outside of the show knows what happened to Detective Daniels. A search on IMDB reveals no information and the role is uncredited on the show.