They say absence makes the heart grow fonder. But will that hold true for the cast of Bones, which reunites in the Season 6 premiere after spending seven months thousands of miles apart?Stephen Nathan tells TVGuide.com. "What the season seems to be doing is trying to keep everyone off-balance. The best-laid plans for all of our characters might be very different than we think they are. It also reinforces the relationship that all of our people have. We see in a way how close this group is and how much they needed each other, even in that time that they were apart."At the core of that group, of course, is Dr. Temperance Brennan (Emily Deschanel) and Seeley Booth (David Boreanaz), who Brennan rejected last season. "Booth professed his love to Brennan, who was unable to accept this and unable to reciprocate," Nathan says. "Obviously, the audience knows it's not because she doesn't want to, it's that she's incapable of it. She's frightened; there's something amiss there."But Brennan has her regrets, Nathan says. "I think she missed something when she was away. I think there was a part of her that wished she could have her old life back. As much as she thought she was an anthropologist who merely lived in her mind, she had learned something else with Booth. When she comes back, she expected the Booth that she left, but she finds a very different Booth."Kathryn Winnick). "Booth said he was going to move on, and Booth moved on," Nathan says. "When we pick him up, he has forged a new life for himself emotionally."Now, whether he continues to move on is another thing entirely," Nathan continues. "All of this occurred when he was not around Brennan. So Brennan's presence in the mix of this other relationship will alter the relationship — it just has to. But that doesn't mean that Booth's relationship with Hannah is any less real than he thinks it is."On the flip side of relationship drama, Nathan promises that newlyweds Angela (Michaela Conlin) and Hodgins (TJ Thyne) are still going strong after their time in Paris. "We want to have a really good, healthy relationship on the show," Nathan says. "That doesn't mean they don't have issues. ... We're going to try to deal with those events that occur in any couple's life and how a couple that loves each other deals with those events."