There is a few people that thought they were a couple. 你 see Alex Conrad needed Castle's "Permission" to call Beckett. Will Sorenson (Beckett's Ex Boyfriend) He knew that 城堡 liked her. The Red head woman who was a profiler thought that they were together. Castle's Ex girlfriend who is know married 说 to Beckett "He's All Yours" The FBI guy who helped them when there was a bomb and when they were in the freezer. He thought that they were a couple. 你 have everyone at the precinct thinking that 城堡 and Beckett should be together! :D Also Josh noticed because he was protective of Kate when 城堡 was around. 你 had Royce (Beckett's police trainer) he knew that they had something real in the note that he wrote her he told her! There 你 have it there is sooo many people that thought they were a couple! :)
