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Welcome to Watch Castle Online, the ultimate website for those who love to Watch Castle Online for free. Here you can stream all Castle episodes online without downloading any extra software on your computer. Watch Castle Online is a spam free organization that is dedicated to bringing you the latest episodes from Castle. We update our website on weekly basis, so if you missed the latest Castle episode on TV, make sure to check our website to follow the action. To start your navigation, use the season menu located on the left side of the website under the "Watch Castle Online Season Guide" section.

Castle's Latest Episode
S2E24: A Deadly Game
Air Date: May 17, 2010
Views: 1,404
Comments: 2
Rating: 4.83/5 (6)
Nothing is as it seems when Castle and Beckett investigate what appears to be the assassination of an intelligence operative. Meanwhile, Beckett's romance with Demming threatens her relationship with Castle, forcing them to confront their feelings for each other.

Most Viewed Episodes

Castle Season 1 Episode 1
Views: 1,474 | Aired: Mar 9, 2009
Castle Season 2 Episode 24
Views: 1,404 | Aired: May 17, 2010
Castle Season 2 Episode 23
Views: 1,399 | Aired: May 10, 2010
Castle Season 1 Episode 2
Views: 1,015 | Aired: Mar 16, 2009
Castle Season 2 Episode 1
Views: 932 | Aired: Sep 21, 2009
Castle Season 1 Episode 4
Views: 923 | Aired: Mar 30, 2009
Castle Season 1 Episode 3
Views: 854 | Aired: Mar 23, 2009
Castle Season 2 Episode 18
Views: 780 | Aired: Mar 29, 2010

Top Rated Episodes

Castle Season 2 Episode 20
| Aired: Apr 12, 2010
Castle Season 2 Episode 24
| Aired: May 17, 2010
Castle Season 2 Episode 23
| Aired: May 10, 2010
Castle Season 2 Episode 22
| Aired: May 3, 2010
Castle Season 2 Episode 10
| Aired: Nov 23, 2009
Castle Season 2 Episode 17
| Aired: Mar 22, 2010
Castle Season 2 Episode 1
| Aired: Sep 21, 2009
Castle Season 2 Episode 3
| Aired: Oct 5, 2009

More Latest Released Episodes

S2E23: Overkill
Air Date: May 10, 2010
Views: 1,399
Comments: 0
Rating: 4.67/5 (3)
A robbery-homicide prompts Beckett to invite Demming to assist on a case, giving Castle a ringside seat to their budding romance. When it becomes clear that the two men have very different ideas about how to proceed, the investigation becomes an unspoken competition for Beckett's attention, one in which each man races to solve the case, as Beckett referees between her two admirers.
S2E22: Food to Die For
Air Date: May 3, 2010
Views: 770
Comments: 2
Rating: 4.67/5 (3)
A high profile chef is found frozen to death in the kitchen of a hot New York restaurant. Complications ensue when Castle and the restaurant owner, an old high school girlfriend of Beckett's, share an attraction. Meanwhile, Beckett's relationship with Det. Demming continues to grow.
S2E21: Den of Thieves
Air Date: Apr 19, 2010
Views: 691
Comments: 0
Rating: 2.33/5 (3)
Investigating the murder of a thief, Castle and Beckett are surprised to learn that Esposito has a personal connection to the suspected killer. Another surprise is in line for Castle when Beckett hits it off with the handsome Robbery detective assigned to the case.
S2E20: The Late Shaft
Air Date: Apr 12, 2010
Views: 747
Comments: 1
Rating: 5.00/5 (1)
When Castle appears on a late-night talk show to promote his book, Heat Wave, legendary host Bobby Mann leans in during a commercial break and whispers, "They want me dead." When Mann dies later that night, seemingly of natural causes, Castle has to convince Beckett that there was foul play. During the investigation, Castle is seduced by a Hollywood hottie, who was the other guest on Bobby Mann's show the night he died
S2E19: Wrapped Up in Death
Air Date: Apr 5, 2010
Views: 639
Comments: 2
Rating: 3.00/5 (2)
The investigation into the shocking death of a museum curator, crushed by a falling gargoyle, takes a bizarre turn when Castle and Beckett learn that he isn't the first member of a recent archeological expedition to die. It turns out there was a legend inscribed over the burial chamber the team unearthed warning that "all who gaze upon the face of the mummy are doomed." Was the curator just the latest victim of "The Mummy's Curse"? And if so, what does that mean for Castle, who snuck a peek at the mummy when no one was looking?
S2E18: Boom!
Air Date: Mar 29, 2010
Views: 780
Comments: 0
Rating: 3.00/5 (2)
In the second part of the story begun in "Tick, Tick, Tick...," the serial killer remains at large and is taunting Castle, Beckett and Jordan Shaw to catch him. Delany plays Federal Agent Jordan Shaw, an insightful and accomplished Federal Investigator who teams up with Castle and Beckett to hunt down this cunning and elusive serial killer.
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