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Castle

Watch Castle Season 4 full episodes online, free and paid options via our partners and affiliates.

A Priest on Castle
Watch Castle Season 4 Episode 23
"Always"
Original Air Date:

Beckett is hot on the trail of the person who shot her mother. Read on for a recap of the Castle season finale.

Zombies on Castle?
Watch Castle Season 4 Episode 22
"Undead Again"
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A zombie attack on Castle?!? That's the theory that starts to fly on this season four episode.

Ready to Brawl
Watch Castle Season 4 Episode 21
"Headhunters"
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It's a Firefly reunion on Castle this week, as Adam Baldwin guest stars in the fun role of Detective Ethan Slaughter.

Shirtless Holdup
Watch Castle Season 4 Episode 20
"The Limey"
Original Air Date:

Brett Tucker guest stars this week as a detective from Scotland Yard. He teams up with Beckett and Castle on a personal case.

Tim Guinee on Castle
Watch Castle Season 4 Episode 19
"47 Seconds"
Original Air Date:

A bomb goes off during a protest this week, causing Castle and Beckett to go back over the timeline of the event, and also to evaluate their lives.

A Night of Dance Set
Watch Castle Season 4 Episode 18
"A Dance with Death"
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Castle delves into the world of reality TV this week, as a contestant on "A Night of Dance" is murdered n her dressing room.

Ryan and Espo
Watch Castle Season 4 Episode 17
"Once Upon a Crime"
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The detectives look into the deaths of women dressed as fairytale characters while Martha puts on a one woman show.

Sophia Turner and Company
Watch Castle Season 4 Episode 16
"Linchpin"
Original Air Date:

This is the conclusion of the annual two-parter. It features Castle and Beckett racing to stop a chain of dangerous events from unfolding.

Jennifer Beals on Castle
Watch Castle Season 4 Episode 15
"Pandora"
Original Air Date:

Castle and Beckett are after a killer this week, which leads them to a major conspiracy. Jennifer Beals guest stars.

Castle in 1947
Watch Castle Season 4 Episode 14
"The Blue Butterfly"
Original Air Date:

Told through flashbacks, Castle and the detectives investigate a murder linked to a double homicide in the 1940's.

Hilarie Burton on Castle
Watch Castle Season 4 Episode 13
"An Embarrassment of Bitches"
Original Air Date:

The murder of a dog trainer/judge has Castle and Beckett looking into guest star Hilarie Burton's character, Kay Cappuccio, a character resembling reality star Kim Kardashian.

Castle, Beckett and the Mayor
Watch Castle Season 4 Episode 12
"Dial M for Mayor"
Original Air Date:

The detectives investigate a murder which leads back to Castle's friend, Mayor Welden.

Sharing Chinese Food
Watch Castle Season 4 Episode 11
"'Till Death Do Us Part"
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Ryan prepares to get married and the detectives look to solve the murder of a pick up artist.

Handcuffed Together
Watch Castle Season 4 Episode 10
"Cuffed"
Original Air Date:

Castle and Beckett wake up handcuffed together with no memory of the situation. Time to find out what happened!

A Case of PTSD
Watch Castle Season 4 Episode 9
"Kill Shot"
Original Air Date:

A sniper is making waves in NYC, causing Beckett to deal with her PTSD. Castle and Esposito do their best to help her through the situation.

A Casino Case
Watch Castle Season 4 Episode 8
"Heartbreak Hotel"
Original Air Date:

An Atlantic City casino owner is found dead in NYC leading to a bachelor party for Ryan on the latest episode of Castle.

Dean Norris on Castle
Watch Castle Season 4 Episode 7
"Cops & Robbers"
Original Air Date:

A bank robbery goes bad when Castle and Martha are held hostage inside. Find out what happened in the latest episode of Castle now!

A Ghost Did It?
Watch Castle Season 4 Episode 6
"Demons"
Original Air Date:

Castle and Beckett hunt down the murder of a famous ghost hunter on the latest installment of Castle.

Kristin Lehman on Castle
Watch Castle Season 4 Episode 5
"Eye of the Beholder"
Original Air Date:

Kristin Lehman guest stars this week as Serena Kaya, an insurance investigator who helps out Beckett & Castle when a murder and robbery takes place at an art museum.

Coffee at the Crime Scene
Watch Castle Season 4 Episode 4
"Kick the Ballistics"
Original Air Date:

Uh-oh. The gun used in a murder this week is discovered to be Det. Ryan's former service weapon. That can't be good.

In the Coroner's Office
Watch Castle Season 4 Episode 3
"Head Case"
Original Air Date:

A missing body leads the detectives into the world of cryonics and Alexis gets news from Stanford.

Beckett and Castle at Work
Watch Castle Season 4 Episode 2
"Heroes & Villains"
Original Air Date:

Beckett & Castle track down a vigilante named Lone Vengeance through the city and make some headway with Captain Gates.

Return of Beckett
Watch Castle Season 4 Episode 1
"Rise"
Original Air Date:

On the fourth season premiere of Castle, Beckett's fate is found out and the detectives meet their new captain. Will Castle & Beckett reconnect? Find out in our review now.

Castle Season 4 Quotes

You? Skepticus Maximus?

Castle

That's the stuff dreams are made of.

Castle
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