• Tamara Taylor, David Boreanaz, Emily Deschanel, Michaela Conlin and T.J. Thyne arrive at Fox TV's 'Bones' 200th Episode Celebration at Herringbone Mondrian in West Hollywood, California.

Tamara Taylor, David Boreanaz, Emily Deschanel, Michaela Conlin and T.J. Thyne arrive at Fox TV's 'Bones' 200th Episode Celebration at Herringbone Mondrian in West Hollywood, California. (Photo : Getty Images/Kevin Winter)

"Bones" Season 11 finale debuts July 21. Episode 22 is titled "The Nightmare in the Nightmare" and it marks the end of eleventh season of FOX's longing running procedural. Fans must brace themselves because the show is going to bring back one of the scariest serial killers and Brennan will be in danger. Here are the detailed spoilers for episode 11X22. Read on to find out what happens next.

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[Spoiler alert! This article contains spoilers for "Bones" Season 11 episode 22 (finale) "The Nightmare in the Nightmare." Do not read further if you don't wish to know more about it.]

In the final chapter, the Jeffersonian team will work on an old case involving a dangerous serial killer. According to Spoiler TV's description for "Bones" Season 11 finale, the team will investigate a serial killer from the past.

In episode 22, the show will finally solve the case that came up earlier this season. In episode 13, the team found out about a killer, who lives with the corpse of his victims for months before discarding it. The team investigated the murder of a social worker and figured that it was the work of a serial killer. 

"Bones" Season 11 finale will see the team solve the case and attempt to find "The Puppeteer." In the meantime, Brennan feels the pressure. She tries to deal with the guilt of retirement she took last year, the time when she could have stopped the serial killer. However, she is oblivious to impending danger. It is said that she might be in danger. Is The Puppeteer targeting Brennan?

Entertainment publication TV Guide reveals that by the end of "Bones" Season 11 episode 22 fans will find out who the serial killer but there is an unexpected twist. Speaking about the big reveal, executive producer Jonathan Collier said it "dovetails with our team, with our story and with our past."

Note: Promo video for "Bones" Season 11 finale (episode 22) is expected to be released after the broadcast of episode 21 on July 14. Stay tuned, it will be made available here.

In the meantime, fans can take a glimpse at episode 11X22 via photos published on Buddy TV.

"Bones" Season 11 episode 22 (finale) airs July 21 at 9:00 pm on FOX. Stay tuned for more spoilers and updates.

 UPDATE

A promo video for "Bones" Season 11 finale (episode 22) is released. Scroll down to take a glimpse of "The Nightmare in the Nightmare."