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There are 81 episodes Castle season 1, season 2, season 3 and season 4.
Castle season 1 episode list:
- Season 1, Episode 1 – Flowers for Your Grave
- Season 1, Episode 2 – Nanny McDead
- Season 1, Episode 3 – Hedge Fund Homeboys
- Season 1, Episode 4 – Hell Hath No Fury
- Season 1, Episode 5 – A Chill Goes Through Her Veins
- Season 1, Episode 6 – Always Buy Retail
- Season 1, Episode 7 – Home Is Where the Heart Stops
- Season 1, Episode 8 – Ghosts
- Season 1, Episode 9 – Little Girl Lost
- Season 1, Episode 10 – A Death in the Family
Castle season 2 episode list:
- Season 2, Episode 1 – Deep in Death
- Season 2, Episode 2 – The Double Down
- Season 2, Episode 3 – Inventing the Girl
- Season 2, Episode 4 – Fool Me Once…
- Season 2, Episode 5 – When the Bough Breaks
- Season 2, Episode 6 – Vampire Weekend
- Season 2, Episode 7 – Famous Last Words
- Season 2, Episode 8 – Kill the Messenger
- Season 2, Episode 9 – Love Me Dead
- Season 2, Episode 10 – One Man’s Treasure
- Season 2, Episode 11 – The Fifth Bullet
- Season 2, Episode 12 – A Rose for Everafter
- Season 2, Episode 13 – Sucker Punch
- Season 2, Episode 14 – The Third Man
- Season 2, Episode 15 – Suicide Squeeze
- Season 2, Episode 16 – The Mistress Always Spanks Twice
- Season 2, Episode 17 – Tick, Tick, Tick…
- Season 2, Episode 18 – Boom!
- Season 2, Episode 19 – Wrapped Up in Death
- Season 2, Episode 20 – The Late Shaft
- Season 2, Episode 21 – Den of Thieves
- Season 2, Episode 22 – Food to Die For
- Season 2, Episode 23 – Overkill
- Season 2, Episode 24 – A Deadly Game
Castle season 3 episode list:
- Season 3, Episode 1 – A Deadly Affair
- Season 3, Episode 2 – He’s Dead, She’s Dead
- Season 3, Episode 3 – Under the Gun
- Season 3, Episode 4 – Punked
- Season 3, Episode 5 – Anatomy of a Murder
- Season 3, Episode 6 – 3XK
- Season 3, Episode 7 – Almost Famous
- Season 3, Episode 8 – Murder Most Fowl
- Season 3, Episode 9 – Close Encounters of the Murderous Kind
- Season 3, Episode 10 – Last Call
- Season 3, Episode 11 – Nikki Heat
- Season 3, Episode 12 – Poof, You’re Dead
- Season 3, Episode 13 – Knockdown
- Season 3, Episode 14 – Lucky Stiff
- Season 3, Episode 15 – The Final Nail
- Season 3, Episode 16 – Setup
- Season 3, Episode 17 – Countdown
- Season 3, Episode 18 – One Life to Lose
- Season 3, Episode 19 – Law & Murder
- Season 3, Episode 20 – Slice of Death
- Season 3, Episode 21 – The Dead Pool
- Season 3, Episode 22 – To Love and Die in L.A.
- Season 3, Episode 23 – Pretty Dead
- Season 3, Episode 24 – Knockout
Castle season 4 episode list:
- Season 4, Episode 1 – Rise
- Season 4, Episode 2 – Heroes and Villains
- Season 4, Episode 3 – Head Case
- Season 4, Episode 4 – Kick the Ballistics
- Season 4, Episode 5 – Eye of the Beholder
- Season 4, Episode 6 – Demons
- Season 4, Episode 7 – Cops & Robbers
- Season 4, Episode 8 – Heartbreak Hotel
- Season 4, Episode 9 – Kill Shot
- Season 4, Episode 10 – Cuffed
- Season 4, Episode 11 – Til Death Do Us Part
- Season 4, Episode 12 – Dial M for Mayor
- Season 4, Episode 13 – An Embarrassment of Bitches
- Season 4, Episode 14 – The Blue Butterfly
- Season 4, Episode 15 – Pandora
- Season 4, Episode 16 – Linchpin
- Season 4, Episode 17 – Once Upon a Crime
- Season 4, Episode 18 – A Dance with Death
- Season 4, Episode 19 – 47 Seconds
- Season 4, Episode 20 – The Limey
- Season 4, Episode 21 – Headhunters – April 16, 2012
- Season 4, Episode 22 – Undead Again – April 30, 2012
- Season 4, Episode 23 – Always – May 7, 2012
