The Limey

Plot:

A devilishly handsome detective from Scotland Yard teams up with Castle and Beckett to find the person responsible for the murder of his friend's daughter. Also, Castle and Beckett suspect Nigel, the Deputy General at the British Consulate, is up to more than just ambassadorial balls and diplomatic luncheons. Meanwhile, Lanie convinces Beckett that she needs to make a move on Castle before it is too late.