Source: MSN TV [follow link for complete column]
MSN TV: TONIGHT'S PICKS MONDAY, APRIL 2, 2012
10:01 PM, ABC
Castle and Beckett (Nathan Fillion, Stana Katic) get help from a Scotland Yard detective (Brett Tucker) in investigating the murder of his friend's daughter. A certain British diplomat (Charles Shaughnessy, "The Nanny") raises the detectives' suspicions. Lanie (Tamala Jones) urges Beckett to make a move on Castle while she still can in the new episode "The Limey."