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'Bones' EPs tease the Ghost Killer, season 9 finale and more: 'All bets are off'

Brennan (Emily Deschanel, L) and Booth (David Boreanaz, R) investigate a murder in the "The Repo Man in the Septic Tank" episode of BONES
Brennan (Emily Deschanel, L) and Booth (David Boreanaz, R) investigate a murder in the "The Repo Man in the Septic Tank" episode of BONES
Jennifer Clasen/FOX

"Bones" returns to Mondays with its next episode, and on Friday, March 7, we joined a conference call with executive producers Stephen Nathan and Hart Hanson to get the scoop on what to expect in the remaining season 9 episodes.

Season finale hints This season of "Bones" introduced a new serial killer in the Ghost Killer, and that will be part of the season finale – in a way. "It will be tangentially a part of the season finale. We'll be revisiting the Ghost Killer in episode 20, when we will find that the Ghost Killer is just the tip of an iceberg," Nathan previewed for us. "It is going to lead us into a big conspiracy that appears as if it goes back to the FBI. So the Ghost Killer – you'll see that Hart and I are not madly in love with serial killers – it's a way for us to do a continuing story that doesn't revolve around one murder. It kind of takes us down the rabbit hole in a way that's a little more complicated, a little darker than we have in the past."

The end of the season takes place over four episodes and is "peeling back the layers of the onion," and a little more specifically, "The season finale will redefine Booth's relationship with his crime fighting. The heroes and villains will be reversed and they will not be operating the way they have for the past nine years. How long that will sustain is something that will be answered in the beginning of season 10. Really, all bets are off at the end of season 9," Nathan teased. Oh, and there will be "a delightfully revolting body," so it's probably a good idea to make sure you're done with dinner before watching it.

The squinterns Wendell will return in episode 18. "He will come back mid-treatment and be working at the Jeffersonian still in his old job, although that will get very, very complicated, and it will not unfold the way I think [you] expect it to," Nathan shared.

Ignacio Serricchio is coming in episode 17, and while the Cuban defector was the chief forensic anthropologist in Havana, his credentials don't work here, so he has to take an internship at the Jeffersonian. While he may be equal with Brennan, she is his boss, and he will be back.

Also, Clark has written a book that is "a new wrinkle within the politics of the lab," and its title is "Murder Made Me Do It."

Episode 200 They haven't figured out specifically what they'll be doing for episode 200 just yet – it will air sometime in the first half of next season – but they do want to "do something that's really aimed at the very loyal, crazily noisy and invested fans, another love letter to them" like episode 100 was.

Season 10 plans When Hanson wrote the pilot, he had to also envision the end of the series, and if that end happens to come with season 10, "at least the macro version of what I had in mind we'll be able to use," he said. If the show goes past season 10, "the series will need a bit of…a reinvention." That said, they already know some things they'd like to explore next season, including revisiting Hodgins' brother, Sweets' love life and Ralph Waite's passing.

Also, expect to probably see a glimpse at the past. "We have been toying with the idea for quite a while of visiting the past with Booth and Brenan and with the other characters, and we did have something in the works but we couldn’t really do it because we can't do too many weird ones in one season, but next season, especially if it's the last season, I think we can do a couple," Nathan told reporters. That could include seeing Caroline and Booth's past.

"Bones" season 9 airs Mondays at 8 p.m. on FOX.

Read more about Bones.

© Meredith Jacobs 2014

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