Beckett tries to help Castle and Alexis when the air marshall is murdered aboard their flight to London
ABC, 10:00 PM ET
Somewhat reminiscent of the Liam Neeson movie "Non-Stop," the new episode "In Plane Sight" puts Castle and Alexis (Nathan Fillion, Molly Quinn) aboard a flight to London that turns deadly.
An air marshal on the jet is slain, and as Castle seeks the killer, Beckett (Stana Katic) tries to help with the identification on the ground -- and they need to work fast, since the murderer may strike again. Paula Newsome guest stars. Penny Johnson Jerald also stars.
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