When a series of corpses with ties to Booth's former Army unit appear around D.C., Booth must dive into his past to find the killer before the killer finds Booth. Meanwhile, Brennan's father, Max, hides a serious medical procedure from Brennan, leaving her to grapple with her father's trust and mortality, as well as her family being in danger.
- Temperance Brennan - Emily Deschanel
- Seeley Booth - David Boreanaz
- Jack Hodgins - T.J. Thyne
- Angela Montenegro - Michaela Conlin
- Camille Saroyan - Tamara Taylor
- James Aubrey - John Boyd
Intern of the WeekEdit
- Ryan O'Neal as Max Keenan
- Patricia Belcher as ADA Caroline Julian
- Sunnie Pelant as Christine Booth
- Gerardo Celasco as Mark Kovac
- Brittany Shaw Johns as Jeannine Kovac
- Eugene Alper as Javor Nicovic
- Jennae Hoving as FBI Agent Samantha Chatterjee
- Charles Carpenter as FBI Deputy Field Director Thomas Mordick
- Brigitte Valdez as Caitlin Shwartz
- Jessica L. Fisher as Darla
- Derek Ray Siefert as FBI Agent Austin Suarez
- Jeremy Denzlinger as Aliz Munoz
- Michael Johnson as Mike Reiss
- Zachary Sale as E.M.T.
- Nancy Bellany as Nurse
- This episode marks Ryan O'Neal's final appearence as Max Keenan, who was killed off at the climax of the episode. He had been a recurring role in the series since the season 2 episode, "Judas on a Pole".