Castle: The Final Nail

SYNOPSIS

Beckett attends the scene when Vicky Westlake is murdered with a nail gun, only to find Castle already there and talking to the victim's husband Damian - who turns out be an old schoolmate of the author. When Beckett tags Damian as her prime suspect, Castle digs up evidence from the past to try to convince her that his friend is innocent. Guest starring Jason Wiles (Third Watch).