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Castle (2009) fanart Welcome to Castle (2009) at WatchOnlineFree.TV, a great website for those who love to watch Castle (2009) online for free. Here you can stream all episodes online without having to downloading any additional software on your computer. If you missed the latest Castle (2009) episode on TV, make sure to check our website to follow up on this series!


Latest episode, aired 4 days ago.

Tone Death
Episode 9
Air Date: Feb 8
Season: 8

Tone Death

When a body is found in the theater of Martha's latest show, Castle and Beckett's investigation leads them into the unexpectedly dangerous w…

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Mr. & Mrs. Castle
Episode 8
Air Date: Nov 23, 2015
Season: 8

Mr. & Mrs. Castle

Castle and Beckett investigate the murder of a cruise ship entertainer, only to find themselves trapped at sea with the killer.

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The Last Seduction
Episode 7
Air Date: Nov 16, 2015
Season: 8

The Last Seduction

In order to hunt down the brutal murderer of a grifting seducer, Castle & Beckett must investigate New York's elite. Meanwhile, Castle plans…

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Cool Boys
Episode 6
Air Date: Nov 9, 2015
Season: 8

Cool Boys

Detective Slaughter returns to enlist Castle's help in solving a high-stakes robbery case. But when a body is found linked to the crime, Sla…

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The Nose
Episode 5
Air Date: Oct 19, 2015
Season: 8

The Nose

When a priceless work of art is stolen and its transporter murdered, Castle and Beckett must work with the key witness to track down the pai…

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