Fourth Season (Castle)

The fourth season of American crime-comedy-drama television series Castle was ordered on January 10, 2011, by ABC: American Broadcasting Company (GoAnimate in Real Life) after Kasey M.D.. The season aired from September 19, 2011, to April 30, 2012. The fourth season initially contained 23 episodes, but Penny Johnson Jerald joined the cast as the new captain, Victoria "Iron" Gates for the fourth season.

Overview
Richard Castle (Fillion) is a famous mystery novelist who has killed off the main character in his popular book series and has writer's block. He is brought in by the NYPD for questioning regarding a copy-cat murder based on one of his novels. He is intrigued by this new window into crime and murder, and uses his connection with the mayor to charm his way into shadowing Detective Kate Beckett (Katic). Castle decides to use Beckett as his muse for Nikki Heat, the main character of his next book series. Beckett, an avid reader of Castle's books, initially disapproves of having Castle shadow her work, but later warms up and recognizes Castle as a useful resource in her team's investigations.

Cast
Nathan Fillion as Richard Castle

Stana Katic as Dt. Kate Beckett

Jon Huertas as Dt. Javier Espositio

Seamus Dever as Dt. Kevin Ryan

Tamala Jones as Dr. Lanie Parish

Molly C. Quinn as Alexis Castle

Susan Sullivan as Martha Rodgers

Penny Johnson Jerald as Captain Victoria Gates

Recurring
Victor Webster as Josh Davidson

Scott Paulin as Jim Beckett

Michael Dorn as Dr. Carter Burke

Guest cast
Geoff Pierson as Mr. Smith

Juliana Dever as Jenny

Derek Webster as Mayor Robert Weldon

Jennifer Beals as Sophia Conrad

Josh Stamberg as Martin Danberg

David Chisum as Thomas Gage

Lorin McCraley as West Side Wally

Episodes

 * 1) Rise (Sept. 19, 2011)
 * 2) Heroes and Villains (Sept. 26, 2011)
 * 3) Head Case (Oct. 3, 2011)
 * 4) Kick the Ballistics (Oct. 17, 2011)
 * 5) Eye of the Beholder (Oct. 31, 2011)
 * 6) Demons (Nov. 7, 2011)
 * 7) Cops & Robbers (Nov. 14, 2011)
 * 8) Heartbreak Hotel (Nov. 21, 2011)
 * 9) Kill Shot (Nov. 28, 2011)
 * 10) Cuffed (Dec. 5, 2011)
 * 11) 'Til Death Do Us Part (Jan. 9, 2012)
 * 12) Dial M for Mayor (Jan. 16, 2012)
 * 13) An Embarrassment of Bitches (Jan. 23, 2012)
 * 14) The Blue Butterfly (Jan. 30, 2012)
 * 15) Pandora (Feb. 6, 2012)
 * 16) Linchpin (Feb. 27, 2012)
 * 17) Once Upon a Time (Mar. 5, 2012)
 * 18) A Dance with Death (Mar. 26, 2012)
 * 19) 47 Seconds (Apr. 2, 2012)
 * 20) The Limey (Apr. 9, 2012)
 * 21) Headhunters (Apr. 16, 2012)
 * 22) Undead Again (Apr. 23, 2012)
 * 23) Always (Apr. 30, 2012)

Media Release

 * Region 1: September 18, 2012
 * Region 2: March 25, 2013
 * Region 3: November 14, 2012