Watch Castle Online: Season 8 Episode 6

at .

The last time we saw Detective Ethan Slaughter he almost got Rick Castle killed. Would his return in Castle Season 8 Episode 6, "Cool Boys" be any different?

This time around Detective Slaughter isn't just investigating a case, he's the main suspect in a homicide. With Esposito and Ryan looking to arrest Slaughter for murder, will Castle help out the man who once put his life in danger? 

And with Captain Beckett away, will anyone be around to bail Castle around when he gets into trouble.

Want to check out the return of Slaughter? You can watch Castle online here at TV Fanatic. 

C. Orlando is a TV Fanatic Staff Writer. Follow her on Twitter.

Show Comments

Castle Season 8 Episode 6 Quotes

Martha: Is that the old friend who almost got you killed a few years ago?
Castle: Yeah, like six times.

This separation thing is getting really old.