A season finale is a good time for a romantic ending. But reaching that type of ending turns out to be a problem on 'Castle' (Mon., 10PM ET on ABC).

[Spoiler alert.]

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This week we have spoilers for: 'Bones,' 'Brothers & Sisters,' 'Castle,' 'Chuck,' 'Desperate Housewives,' 'Eureka,' 'Fringe,' 'Glee,' 'Grey's Anatomy,' 'NCIS,' 'Private Practice,' 'Psych,' 'Smallville,' 'Supernatural,' and 'The Big Bang Theory.'