TV Castle - Season 5 Episode 23 : The Human Factor Castle - Season 5 Episode 23 : The Human Factor 7.975/10 by 2009 users When Homeland Security inexplicably seals the crime scene of a car bombing, Castle and Beckett find themselves with two mysteries on their hands: who murdered the victim, a government whistleblower, and why are federal agents trying to take over the case? The plot thickens when they discover that the victim wasn't killed by a car bomb but by a missile from a military drone. Details Casts Posters Images Title Castle - Season 5 Episode 23 : The Human Factor Alternative Titles Касъл, Castke, Κάστρο, کسل First Air Date 2009-03-09 Last Air Date 2016-05-16 Number of Episodes 173 Number of Seasons 8 Genres Drama, Crime, Networks ABC, Casts Nathan Fillion, Stana Katic, Molly C. Quinn, Jon Huertas, Seamus Dever, Susan Sullivan, Tamala Jones, Toks Olagundoye Plot Keywords , Richard Castle Nathan Fillion Kate Beckett Stana Katic Alexis Castle Molly C. Quinn Javier Esposito Jon Huertas Kevin Ryan Seamus Dever Martha Rodgers Susan Sullivan Lanie Parish Tamala Jones Hayley Shipton Toks Olagundoye Episodes List Castle Season 5 :Episode 1 After the Storm After the Storm 2012-09-24 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 2 Cloudy with a Chance of Murder Cloudy with a Chance of Murder 2012-10-01 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 3 Secret's Safe with Me Secret's Safe with Me 2012-10-08 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 4 Murder, He Wrote Murder, He Wrote 2012-10-15 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 5 Probable Cause Probable Cause 2012-10-29 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 6 The Final Frontier The Final Frontier 2012-11-05 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 7 Swan Song Swan Song 2012-11-12 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 8 After Hours After Hours 2012-11-19 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 9 Secret Santa Secret Santa 2012-12-03 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 10 Significant Others Significant Others 2013-01-07 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 11 Under the Influence Under the Influence 2013-01-14 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 12 Death Gone Crazy Death Gone Crazy 2013-01-21 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 13 Recoil Recoil 2013-02-04 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 14 Reality Star Struck Reality Star Struck 2013-02-11 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 15 Target (1) Target (1) 2013-02-18 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 16 Hunt (2) Hunt (2) 2013-02-25 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 17 Scared to Death Scared to Death 2013-03-18 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 18 The Wild Rover The Wild Rover 2013-03-25 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 19 The Lives of Others The Lives of Others 2013-04-01 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 20 The Fast and the Furriest The Fast and the Furriest 2013-04-15 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 21 The Squab and the Quail The Squab and the Quail 2013-04-22 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 22 Still Still 2013-04-29 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 23 The Human Factor The Human Factor 2013-05-06 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New... Castle Season 5 :Episode 24 Watershed Watershed 2013-05-13 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...