The remains of an escaped convict are found in a residential sewer, but an examination of the sewer pipes indicates that the murder occurred within prison walls. Brennan insists on solving the crime - despite Booth's pleas for her not to overexert herself - and the expectant couple experiences a very untraditional arrival of their baby daughter.
A devilishly handsome detective from Scotland Yard, Simon Hunt, teams up with Castle and Beckett to find the person responsible for the murder of his friend's daughter. Enter Nigel Wyndham, the Deputy General at the British Consulate whom Castle and Beckett suspect 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.
College students order up Colbert Super PAC's Super Fun Pack, beef state governors defend pink slime, and Governor Gary Johnson runs as the 2012 Libertarian candidate.