Castle Season 6, Episode 9 "The Disciple" gave viewers a lot of major shockers! While everyone thought 3XK's story is finished, looks like it doesn't seem that way. From Episode 9, we saw 3XK's story came to life. Here are some major scenes in Castle Episode 9, "The Disciple."

5. Castle And Beckett's Wedding Date Planning - At the start of the episode, Castle and Beckett were having breakfast and talking about the date for their wedding. Beckett wants to set a date for their wedding but Castle insists on planning their honeymoon first telling Beckett, "Planning a honeymoon will help us set a date." Looks like we'll be seeing more of Castle and Beckett's wedding this season!

4. Lanie And Esposito's Doppelgangers - The murder case Beckett and company were trying to solve on Episode 9 involves the death of two people who looked exactly like Lanie and Esposito. This is one major scene in the episode as it became the connection between Castle/Beckett and Dr. Neiman.

3. "Guy In The Hood" - Here's a major scene most people didn't notice. Remember the beginning of the episode where Carl Matthews tried to scram a guy in the hood? Well, when Beckett and company stormed at Carl's place, a guy with the same hooded coat crossed in front of the camera. Could it be the same guy? TV Line talked to series creator Marlowe and asked about this. He replied, "I would say that they bear an uncanny resemblance to each other and seem to be suffering from identical respiratory conditions. It's quite the coincidence, don't you think??" Indeed, it's quite a coincidence since the hooded guy from the first part of the episode also resembles 3XK.

2. Dr. Neiman's "Gift" - Dr. Neiman is the plastic surgeon that changed the appearances of the two murder victims being investigated by Beckett and the team this episode. During Castle's and Beckett's first interaction with Dr. Neiman, she was giving Castle the pen with her name in it. Before Castle could take, Beckett interrupted and Castle wasn't able to get the pen. However, at the later part of the episode when Dr. Neiman escaped, she left the pen drive at her former office table and left a note: "Better luck next time."

1. Beckett's Reaction To The Song - Castle accidentally found out that the pen left behind by Dr. Neiman is actually a pen drive. When Beckett and Castle tried to find out the contents of the drive, they found an audio file stored in the drive. Castle played the file and it was a song "We'll Meet Again." When Beckett heard the song, she was shocked, teary-eyed leaving viewers another question: "What's with Beckett's reaction?"

Check out major spoiler on Beckett's reaction to the song here:

Tune in for more Castle Season 6 SPOILERS! Castle Season 6 will return on January 6, 2014.