Bones' first major guest star of the season has been revealed -- but it's the story line she's involved with that has us most intrigued.

24 and Grey's Anatomy alum Kim Raver will appear in the first two episodes of Season 11 as FBI Special Agent Grace Miller. However, Agent Miller is brought in to investigate the disappearance of none other than Seeley Booth (David Boreanaz)!

This dramatic turn of events will likely be the key to how the show will reintroduce Booth and Brennan (Emily Deschanel) to their jobs of solving murders after they both agreed to walk away from the FBI and the Jeffersonian in the Season 10 finale.

Postmortem: How will Bones go on after that ending?

Besides her role as Audrey on 24 and Teddy Altman on Grey's Anatomy, Raver's TV credits include Revolution and Lipstick Jungle.

Bones returns Thursday, Oct. 1 at 8/7c on Fox.