Castle

Linchpin (Season 4, Episode 16)

TV-PG

TV Episode | 45 min | Comedy, Crime, Drama

Castle and Beckett race to find the "Linchpin" in order to stop the first domino in a chain of events which will plunge the United States into war.

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Cast	+ Add Cast
19 cast members

Name	Known for
Nathan Fillion Richard Castle Richard Castle See fewer	Castle (2009)
Stana Katic Kate Beckett Kate Beckett See fewer	Castle (2009)
Susan Sullivan Martha Rodgers (credit only) Martha Rodgers (credit only) See fewer	Dharma & Greg (1997)
Jon Huertas Javier Esposito Javier Esposito See fewer	This Is Us (2016)
Seamus Dever Kevin Ryan Kevin Ryan See fewer	Castle (2009)
Tamala Jones Lanie Parish Lanie Parish See fewer	Blue Streak (1999)
Molly C. Quinn Alexis Castle (as Molly Quinn) Alexis Castle (as Molly Quinn) See fewer	Castle (2009)
Penny Johnson Jerald Captain Victoria Gates (credit only) Captain Victoria Gates (credit only) See fewer	24 (2001)
Jennifer Beals Sophia Turner Sophia Turner See fewer	Flashdance (1983)
Josh Stamberg Martin Danberg Martin Danberg See fewer	The Affair (2014)
David Chisum Thomas Gage Thomas Gage See fewer	Timeless (2016)
Jim Turner Janacek Spivey Janacek Spivey See fewer	Kicking & Screaming (2005)
Cal Gibson Chess Player Chess Player See fewer	Scrooged (1988)
Russell Edge Jones Jones See fewer	Charlie Wilson's War (2007)
Burnadean Jones Tech #2 Tech #2 See fewer	Bones (2005)
Lak Rana Tech #3 Tech #3 See fewer	General Hospital (1963)
Jade Carter Agent Jack Corrigan Agent Jack Corrigan See fewer	The Waterhole (2009)
David Lim Agent Trahn Agent Trahn See fewer	S.W.A.T. (2017)
Steve Kramer Super Super See fewer	Lupin III: The Castle of Cagliostro (1979)