There's a revolving door of lab assistants, referred to as "squints," on Bones.
But in a recent interview with E! News, David Boreanaz said the show is considering a similar storyine for his character and the FBI. He said:
"We have the squints, but we haven't seen much of the wackies in Booth's world," the actor said. "We just worked with Christopher Duncan. He's a great actor, and he brought so much to the show. He brought such an identity, and what's great about the experience of working with these guys is that they open up the realm of possibilities. To see how these two characters work off of them, how I would react to squint or how she would react to an FBI guy, and it really just opens up the character work."