Michael and Sam discover the location of Bill Johnson (Joe Kimble) by going through his trash and finding laundry bluing, a staple among spies to prevent snooping in trash. Michael returns to his loft to find Larry Sizemore (Tim Matheson), a former mentor of Michael's. Larry offers Michael $20,000, but then Michael raises it to $30,000, to kill a nurse named Jeannie (Amy Pietz) who stands to gain a lot of money when her ailing husband dies. Michael and Fiona track down Jeannie and inform her that Drew (Zachery Ty Bryan), her stepson, has placed out a bounty on her head. Michael protects Jeannie by faking her poisoning, aided by Fiona's new boyfriend, Campbell (Gary Weeks), a paramedic. Larry kills Drew to cover his tracks and leaves Miami. Michael and Sam follow Bill Johnson into a building and find out that Carla has been using Michael for tactical support for an unknown operation. Michael had collected the ID card for entry into the building (Episode 2), and the rifle that sniper Bill Johnson would be using. Michael also attends family counseling with his mother.

When Michael's old acquaintance Larry shows up unannounced, it is up to Michael to clean up his mess. Meanwhile, Michael's brother Nate shows up with his new wife Ruth.

Michael's enemy Brennen and Michael's former friend Larry team up to pressure Michael into killing the individuals on the stolen NOC list. Meanwhile, Sam, Jesse, and Fiona try to help Michael turn the tables on Brennen and Larry.

With convincing from Sam and Jesse, Pearce begrudgingly lets Michael take drastic measures attempting to clear himself of Max's murder. Meanwhile, Larry returns, having kidnapped a government psychiatrist, and insists that Michael help him with a job.

Michael finally meets with the head of the organization he’s been assigned to dismantle, but things get dicey when the leader drugs him at gunpoint in order to learn his deepest secrets. In danger of exposing his cover, Michael soon realizes that in order to protect his future... he'll have to face his past first.