In Plain Sight - Season 5 Episode 6 -

Mary is still reeling from the flood of emotions stirred-up after having to arrest her father, James, when he unexpectedly shows up on her doorstep after being AWOL for 30 years. Bad goes to worse when Special Agent Robert O'Connor, Mary's "favorite" FBI agent, demands her assistance to get James to provide critical information regarding his old partner-in-crime, Cormack “Sully” Sullivan, one of the FBI's 10 Most Wanted.