Castle
After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New York City to tag along with an NYPD homicide investigation team for research purposes.

Season 7 · Episode 21 ·
In Plane Sight
As Castle and Alexis travel to London, their routine flight turns deadly when the plane’s Air Marshal is found murdered. With the help of Beckett on the ground, Castle and Alexis race against time to find the killer before he carries out his fateful plan.
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Episode 21 of season 7 of Castle: “In Plane Sight”. Aired 2015-04-27. Watch it online free on ZapFlix.