This is your one-stop shop to watch Castle free episodes online! No need to sign in. Castle Season 8 has been a lot of twisty-turny fun, so whether you want to catch up or relive the big moments, full episodes await you below. Just click, watch and binge!
S8 E4 What Lies Beneath: Castle is determined to figure out who murdered his idol, a reclusive author, but the truth seems to be stranger than fiction.
S8 E5 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 painting and sniff out the killer.
S8 E6 Cool Boys: Detective Slaughter (guest star Adam Baldwin) returns to enlist Castle’s help.
S8 E7 The Last Seduction: Castle and Beckett investigate the death of a Don Juan.
S8 E8 Mr. & Mrs. Castle: Castle and Beckett investigate the murder of a cruise ship entertainer, only to find themselves trapped at sea with the killer.
Check out this sneak peek from the "Mr. & Mrs. Castle" episode below, and click on the links above to watch the free full episode without signing in!
Castle returns MONDAY FEB 1 10|9c on ABC!