TV Castle - Season 6 Episode 3 : Need to Know Castle - Season 6 Episode 3 : Need to Know 7.975/10 by 2009 users With Beckett still in D.C., Castle and the boys investigate the murder of former child star Charlie Reynolds, who rose to fame playing the lovable nerd on an early 90s High School sitcom. But the case takes a turn for the strange when Agents Beckett and McCord arrive from Washington to take over the investigation, creating competitive tension in the precinct. But why would a washed-up actor's death warrant Federal scrutiny? Whatever the reason, Beckett and McCord aren't telling. Meanwhile, Castle has to contend with a new face at the 12th, NYPD Detective Frank "Sully" Sullivan. Details Casts Posters Images Title Castle - Season 6 Episode 3 : Need to Know 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 6 :Episode 1 Valkyrie (1) Valkyrie (1) 2013-09-23 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 6 :Episode 2 Dreamworld (2) Dreamworld (2) 2013-09-30 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 6 :Episode 3 Need to Know Need to Know 2013-10-07 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 6 :Episode 4 Number One Fan Number One Fan 2013-10-14 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 6 :Episode 5 Time Will Tell Time Will Tell 2013-10-21 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 6 :Episode 6 Get a Clue Get a Clue 2013-10-28 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 6 :Episode 7 Like Father, Like Daughter Like Father, Like Daughter 2013-11-04 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 6 :Episode 8 A Murder Is Forever A Murder Is Forever 2013-11-11 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 6 :Episode 9 Disciple Disciple 2013-11-18 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 6 :Episode 10 The Good, The Bad & The Baby The Good, The Bad & The Baby 2013-11-25 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 6 :Episode 11 Under Fire Under Fire 2014-01-06 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 6 :Episode 12 Deep Cover Deep Cover 2014-01-13 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 6 :Episode 13 Limelight Limelight 2014-01-20 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 6 :Episode 14 Dressed To Kill Dressed To Kill 2014-01-27 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 6 :Episode 15 Smells Like Teen Spirit Smells Like Teen Spirit 2014-02-17 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 6 :Episode 16 Room 147 Room 147 2014-02-24 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 6 :Episode 17 In the Belly of the Beast In the Belly of the Beast 2014-03-03 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 6 :Episode 18 The Way of the Ninja The Way of the Ninja 2014-03-17 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 6 :Episode 19 The Greater Good The Greater Good 2014-03-24 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 6 :Episode 20 That '70s Show That '70s Show 2014-04-21 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 6 :Episode 21 Law & Boarder Law & Boarder 2014-04-28 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 6 :Episode 22 Veritas Veritas 2014-05-05 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 6 :Episode 23 For Better or Worse For Better or Worse 2014-05-12 After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New...