Castle Season 3 Episodes

Find out where to watch Season 3 of Castle tonight
Overview TV Listings Seasons & Episodes Cast

Season 3 Episode Guide

Episode 1 - A Deadly Affair

When Beckett and her team burst into an apartment on a murderer's trail, they see Castle standing over a dead woman's body holding a gun; Beckett arrests Castle as he asserts his innocence.
Episode 2 - He's Dead, She's Dead

Beckett and Castle search for a psychic's killer while debating the existence of extrasensory abilities.
Episode 3 - Under the Gun

When a coded document attracts Castle's attention, Beckett must steer the case back to the violent felons who populated their victim's world; when Beckett's ex-partner arrives, Castle must watch the relationship become romantic.
Episode 4 - Punked

A young mathematician is shot with a 200-year-old bullet, inspiring wild theories by Castle about a time-traveling murderer.
Episode 5 - Anatomy of a Murder

An unknown woman falls out of a casket along with the original deceased when pallbearers lose control of the casket at a funeral; the investigation takes Beckett and Castle into the world of amorous, bed-hopping physicians.
Episode 6 - 3XK

When a beautiful woman is found dead, the evidence indicates a notorious serial killer known as The Triple Killer.
Episode 7 - Almost Famous

When Beckett and Castle respond to an 'officer down' call, they discover the victim is actually a male stripper dressed as a cop.
Episode 8 - Murder Most Fowl

While investigating a subway worker's murder in Central Park, Castle and Beckett unexpectedly uncover a boy's abduction.
Episode 9 - Close Encounters of the Murderous Kind

When a prominent astrophysicist is found dead in her car, Castle is led to theorize her death was the result of an alien abduction.
Episode 10 - Last Call

When a bar owner's body is found in the East River, the investigation takes Castle and Beckett through the forgotten tunnels and passageways of turn-of-the-century New York; Castle considers buying a bar.
Episode 11 - Nikki Heat

When Castle's novel Heat Wave becomes a movie, actress Natalie Rhodes accepts Beckett's invitation to visit and learn about the character she will play; Natalie observes Castle and Beckett's investigation of the murder of a matchmaker.
Episode 12 - Poof! You're Dead

The owner of a historic magic shop is found dead in Houdini's water torture tank; a new romance comes to light.
Episode 13 - Knockdown

The retired lead detective on Beckett's mother's homicide case is gunned down after telling her he has new information; Castle and Beckett's partnership grows stronger.
Episode 14 - Lucky Stiff

The murder of a lottery winner leaves Castle and Beckett with a wealth of suspects; Martha must decide what to do with her inheritance.
Episode 15 - The Final Nail

An old friend of Castle's emerges as the prime suspect in his wife's murder.
Episode 16 - Setup

While investigating an apparent robbery-homicide, Beckett and Castle discover the victim was involved in a mysterious conspiracy; as the stakes rise, a federal agent (Adrian Pasdar) takes over the case.
Episode 17 - Countdown

Castle and Beckett must set aside their differences with Agent Fallon while trying to prevent a city-wide catastrophe.
Episode 18 - One Life to Lose

When the head writer on a popular soap opera is killed with a fire axe, Castle is able to use his skills as an author to make a discovery about a killer.
Episode 19 - Law & Murder

A juror suddenly dies during a high-profile trial involving a murdered socialite.
Episode 20 - Slice of Death

When a reporter is found dead inside a pizza oven, Castle and Beckett try to determine why he was murdered.
Episode 21 - The Dead Pool

Castle and Beckett investigate the death of a champion swimmer; authors Michael Connelly and Dennis Lehane give Castle advice.
Episode 22 - To Love and Die in L.A.

Against orders, Beckett travels to Los Angeles while investigating her ex-partner's murder; Castle questions Beckett's motives.
Episode 23 - Pretty Dead

After a contestant in a beauty pageant is found strangled, many suspects turn up, including jealous fellow contestants, the pageant's sponsor (Michael McKean), and the show's host (Sasha Roiz).
Episode 24 - Knockout

A professional hit man (Max Martini) with information about the murder of Beckett's mother escapes during a court hearing; Castle and the team uncover a deep conspiracy.


More movies and TV shows at the Australian TV Listings Guide..

-

In order to keep our service free we display advertising and may earn affiliate fees for purchases you make on external sites that we partner with.
All content is © 2025 On TV Tonight unless pertaining to advertisers, companies, studios, movies and TV series listed on this site.