Mary works with an unapologetic con artist.

Mary protects a courtesan from the gangster father of her baby.

Mary must protect her least favorite witnesses on the day of her sister's wedding.

Mary sees whether she can balance motherhood with a demanding profession and a dysfunctional home life, or if she will put her baby up for adoption.

When Marshall's witness escapes from the WITSEC offices and disappears on an Indian Reservation, Mary and Marshall will need the help of a Native American detective to track him down.

Mary protects a bigamist not only from his former employer, but also his two wives. In WITSEC, cheating the black market can be dangerous; but cheating on multiple wives is a death sentence.

Mary is still reeling from the flood of emotions stirred-up after having to arrest her father, James, when he unexpectedly showed 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.

Series Finale: Drastic changes take place at the Albuquerque WITSEC office. Mary finds herself caught between a witness and an unexpected family reunion.