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The Baltimore Sun

'Castle,' ABC

Mondays Nathan Fillion (cult-adored in "Firefly") plays a party-boy mystery novelist who teams with Stana Katic's NYPD detective to solve crimes and banter electrically; trailers do not exactly suggest "Murder, He Wrote" ("Moonlighting" is the obvious template). Sparks will fly is the idea. (March 9, 10 p.m)Patrick Harbron / ABC