The barely legal daughter of Mary's witness – a Miami racketeer – finds herself in a dangerous romance, just as Raph's mother visits to prepare an engagement feast for the surprised Mary.

The episode was rated 8.33 from 45 votes.

Mary lends her expertise for the U.S. Marshalls by making a training video with a film crew. Elsewhere, Marshall prepares the arrangements so that an elderly mobster in Witsec can go to his son's funeral.

The episode was rated 8.34 from 44 votes.

Mary and Marshall try to help FBI Agent Mike Faber convince his informant to enter WITSEC. Despite their best efforts, the informant refuses their protection and gets himself into a heap of trouble. After Mary, Marshall and Agent Faber save the informant from certain death, he and his family join Witsec.

The episode was rated 8.39 from 44 votes.

In 2003 Mary meets Marshall for the first time as they get lovers CLAUDIA TOBIN and HENRY DOER into the WitSec program, and it's a toss-up whose relationship is going to last: Claudia and Henry's, or Mary and Marshall's.

The episode was rated 8.41 from 46 votes.

FBI agent O'Connor arrests Brandi on charges of drug trafficking and murder. Insisting her sister is innocent, Mary works to help Brandi while ultimately trying to discover O'Connor's real motive for his actions.

The episode was rated 8.41 from 46 votes.

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.

The episode was rated 8.43 from 49 votes.

An Amish witness comes into the program and must learn to adapt.

The episode was rated 8.44 from 52 votes.

An engineer blamed for a bridge collapse enters the program after being targeted by angry family members of the victims who died in the tragedy.

The episode was rated 8.46 from 37 votes.

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.

The episode was rated 8.49 from 55 votes.

Mary uses a thief to catch a thief when she asks a witness to consult on a crime in order to exonerate Brandi of grand theft auto.

The episode was rated 8.50 from 52 votes.

Having slipped through the fingers of the FBI, James Shannon is on the run again and heading for the border, but first he must stop to take care of a little unfinished business. Agent O'Connor, convinced that she was somehow involved in James' escape, places Mary under investigation, but when he refuses to listen to her suggestions about the possible whereabouts of her father.

The episode was rated 8.53 from 53 votes.

A building collapses on one of Mary's witnesses, leaving him exposed to outside threats, so Mary has to risk her life in order to keep her witness safe.

The episode was rated 8.55 from 47 votes.

Mary works with an unapologetic con artist.

The episode was rated 8.60 from 47 votes.

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

The episode was rated 8.66 from 56 votes.

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

The episode was rated 8.74 from 46 votes.