It was Castle's annual two-parter and Castle Season 7 Episode 14 had us on the edge of our seats the entire hour. 

Lanie was the first to figure out the connection between the dead girl on her table and Dr. Kelly Niemann's work on Pam Hodges, the woman who was made to look just like Lanie before she was murdered. 

That's when Beckett asks Capt. Gates to bring Castle back for this case. She gets the OK from the DA's office just as they run into Jerry Tyson. 

Watch Castle Season 7 Episode 14 Online

But is it really Jerry Tyson. He looks just like 3XK but he claims to be Michael Boudreaux a man who has been surgically altered by Dr. Kelly Niemann. Even his finger prints say he is Michael Boudreaux but Castle and Beckett don't believe it. Castle goes so far as to profile Tyson and he and Beckett track down Jerry Tyson's mother. 

But will the DNA evidence they think they have lead back to Jerry Tyson or Michael Boudreaux? And when Beckett heads out on her own to pick up another look-a-like made by Kelly Niemann, will she make it back to the precinct alive.

You won't want to miss a minute of the intense drama. Watch Castle online right here at TV Fanatic. 

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