'Castle' Episode 4.20 Photos: A Handsome Stranger in 'The Limey'

Beckett gets a little more than just some investigative assistance when the handsome Scotland Yard detective Simon Hunt (guest star Brett Tucker) teams up with Castle and Beckett to find the murderer of his friend's daughter. Charles Shaughnessy also guest-stars as Nigel Winthrop, the Deputy General of the British Consulate, a man who might be up to more than ambassadorial balls and diplomatic luncheons. While all this is going on, Lanie gives Beckett some advice about going after Castle -- before it's too late. "The Limey" airs on Monday, April 2 at 10pm on ABC.