When a murder victim turns out to be a student in an English as a Second Language class, Rick goes undercover in Castle Season 8 Episode 14 to try and track down the murderer. 

What went down after he didso?

Also, when Castle begins to have flashbacks of memories during the time he was abducted, did he take off to try and solve the mystery that's plagued him for over a year?

A pretty intriguing question, right?

To find out, watch Castle online now here at TV Fanatic. 

Just use the video above to get started.

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