U.S. Marshall Mary Shannon must hunt down witnesses for federal cases in the witness protection program while also managing rather dysfunctional family and her own personal life.
S1/EP 1 - In Plain Sight - Pilot <90 Min.>
U.S. Marshal Mary Shannon works in the highly-secretive branch of the witness protection program (WITSEC), relocating Federal Witnesses while at the same time attempting to manage her own dysfunctional family.
S1/EP 2 - Hoosier Daddy
Mary protects a 10-year-old witness from being returned to his father, one of the largest drug traffickers in the Midwest.
S1/EP 3 - Never the Bride
Mary must act as maid of honor to protect her witness - a diamond smuggler - at her high-profile wedding.
S1/EP 4 - Trojan Horst
Mary and Marshall are caught in the cross-fire of a contract killer while transporting a witness.
S1/EP 5 - Who Shot Jay Arnstein?
Mary works to solve the mystery of who tried to kill her witness, an art dealer. To complicate matters, both his mistress and his wife are in the program... and key suspects.
S1/EP 6 - High Priced Spread
Mary learns that her witness, an NCAA basketball star, has a gambling problem.
S1/EP 7 - Iris Doesn't Live Here Anymore
An entire family is forced to enter WITSEC after their teenaged daughter witnesses a gang murder.
S1/EP 8 - Don of the Dead
Mary's witness seems to have died in a car accident but she's not sure it wasn't related to his past life.
S1/EP 9 - Good Cop, Dead Cop
Mary has a one-night stand with a hunky witness, but she suffers the consequences when he is accused of murder.
S1/EP 10 - To Serge With Love
Mary continues to help her witness, Natasha, the mild-mannered accountant from the pilot, adjust to her new life, which becomes more complicated when she discovers her boyfriend is also in WITSEC.
S1/EP 11 - Stan By Me
After watching her mother audition for "Sweet Charity""
S1/EP 12 - A Fine Meth
The family regroups after Mary's ordeal; Marshall and Stan deal with Spanky.
S2/EP 1 - Gilted Lily
When a witness turns up dead, Mary ditches administrative leave to solve a 10 Little Indians story --- until her own brand of Post-Traumatic-Stress disorders her plan.
S2/EP 2 - In My Humboldt Opinion
When a marijuana mastermind from the NorCal grasslands is unable to testify without the pot to neutralize his Severe Anxiety Disorder, Mary finds herself in the weeds.
S2/EP 3 - A Stand-Up Triple
When a hot mom-on-the-prowl witness is having problems with her brood, Mary soon finds herself playing babysitter to three difficult kids.
S2/EP 4 - Rubble With A Cause
When a huge building collapse traps one of Mary's witnesses under the rubble and out in the open, his injury plays second to the threat of a professional assassin up on the roofs.
S2/EP 5 - Aguna Matatala
An Orthodox Jewish witness, whose estranged wife refuses to enter WITSEC, soon finds himself being followed by a mysterious man (guest star Richard Schiff) who answers to a higher authority.
S2/EP 6 - One Night Stan
When Stan's first witness turns up dead, with his badge amongst the bones, he becomes the chief suspect - forcing Mary & Marshall to dig deeper into a 20-year-old love triangle.
S2/EP 7 - Duplicate Bridge
When a bridge collapses and plunges many to their death, the victims' families come after the engineer, who, once in WITSEC, attempts to clear his name no matter what the consequence.
S2/EP 8 - A Frond in Need
When a series of murders seem to follow a new ex-con witness, including stabbing Mary's friend, she and Marshall have to figure out if he's the killer in time to save his next victim.
S2/EP 9 - Who's Bugging Mary?
When Brandi is arrested by Agent O'Connor for drug trafficking and murder, Mary races to find a way out for Brandi and the sordid motive for his vendetta.
S2/EP 10 - Miles to Go
After briefing a new witness, whose testimony is contingent on visitation rights with his son, Mary learns the son is missing and sets out to find him.
S2/EP 11 - Jailbait
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.
S2/EP 12 - Training Video
Mary serves as Technical Advisor to The Marshals Service new training video, while Marshall arranges to get one of Witsec's charter members, a geriatric goodfella (Martin Landau) from the Philly Mob, to his son's funeral.
S2/EP 13 - Let's Get It Ahn
A world-class counterfeiter witness - whose girlfriend's infidelity moved her to confess - is suspect in the murder of another "friend""
S2/EP 14 - Once A Ponzi Time
When a Wall Street blue-blood rats on his boss' investment fraud and hides out in WITSEC, he volunteers to give up his great fortune, that is until a ransom from his past life comes calling.
S2/EP 15 - Don't Cry For Me, Albuquerque
The U.S. Government enlists WITSEC to hide one of Latin America's feistiest political activists and everything goes South when the budding Evita moves to the bad part of town.
S3/EP 1 - Father Goes West
A former high line thief from Boston tries to give up crime for the sake of his teenage son, and Mary and Marshall search for the person who nearly killed Mary in the season two cliffhanger. Guest starring Donnie Wahlberg, Sean Marquette, Charlie Haid, Cristian de la Fuente, Joshua Malina and Lesley Ann Warren.
S3/EP 2 - When Mary Met Marshall
A break-in threatens the security of the first witnesses Mary and Marshall handled together, prompting flash backs to the way Mary joined WitSec. Guest starring Allison Janney, Tess Harper, Josh Cooke, Jeannine Kaspar and Joshua Malina.
S3/EP 3 - Coma Chameleon
BATF Agent, Wade Guthrie, is shot during an undercover weapons deal. When he wakes up, Wade learns he has been protected by Witsec's Mary Shannon during his three-year coma. It is only his eye-witness testimony that can put a prolific weapons trafficker behind bars. Guest starring Rita Moreno.
S3/EP 4 - Whistle Stop
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. Meanwhile, Stan has to deal with an ex-boxer/witness suffering from pugilistic dementia. Guest starring Steven Weber.
S3/EP 5 - Fish Or Cut Betta
When Dominic, a former sociopathic hit man with a love of explosives, falls in love for the first time, Mary fears that he won't handle rejection very well. Meanwhile, the WitSec office welcomes a new financial manager, and Mary says her goodbyes to Raphael.
S3/EP 6 - No Clemency For Old Men
When a hardened bank robber who's been in prison for decades is finally paroled, it falls to Mary to help him acclimate to life on the outside and keep him from falling back into a life of crime. Meanwhile, when one of Mary's other witnesses becomes the victim of a revenge plot, Marshall steps in to help out -- only to find himself in a predicament when the witness prefers him to Mary.
S3/EP 7 - Love's Faber Lost
Agent Mike Faber returns to Mary's life when he gives her a new witness: Natalie, a key witness and co-conspirator in a nationwide mortgage fraud scheme which was operated by major gangs to raise millions for drugs and weapons. Mary is forced to work closely with Faber, who appears to have an alternate agenda: sparking a romance between the two.
S3/EP 8 - Son of Mann
Seth Mann, a legendary Marshal whose career spans decades and who also happens to be Marshall's father, comes into Albuquerque to work on Operation Falcon, a nationwide sweep of open warrants. Meanwhile, Brandi returns to Albuquerque with a suspicious story about her disappearance and as surprise guest connected to her past.
S3/EP 9 - Death Becomes Her
A woman from an organized crime family experiences a major health scare and witnesses her beloved niece repeating all of her mistakes. After she becomes vocal about her disapproval of her family’s life, her cousin threatens her and she decides to take action and turn to the Feds. One problem: she has a secret that puts her status in Witness Protection in jeopardy, so she turns to the one person who can help - her new friend Mary Shannon. Guest starring Lesley Ann Warren, Erika Alexander, Michael Badalucco and Laura San Giacomo as Mia.
S3/EP 10 - Her Days Are Numbered
A witness with Aspergers who has no social filter and can't lie stymies Mary, particularly when the witness refuses to testify against her only friend -- the key conspirator in a numbers case. Marshall and Stan race to figure out why an Immigration and Customs Enforcement agent is holding up the visa of a key witness before she is deported. Brandi reveals her plan for the money she made by investing with Scott. Guest starring Aaron Ashmore.
S3/EP 11 - The Born Identity
Mary's newest witness is a homeless man who exposed a pipe bomb plot. As he struggles to conform to the rules of WitSec, Mary agrees to help him search for his birth parents -- which presents unexpected problems when they are found. Meanwhile, Brandi becomes distrustful of Scott who once again needs money.
S3/EP 12 - WitSec Stepmother
Mary plays "stepmother"" to a rebellious 16 year-old witness of a jewelry heist whose separated parents are too self-involved to deal with their teenaged daughter's issues. At a family reunion
S3/EP 13 - A Priest Walks Into a Bar
A priest, who witnesses the murder of a stripper, is all too eager to leave the priesthood when he joins WitSec but hesitant to cut off ties with the victim's family. Stan struggles with telling a deceased witness's daughter the truth about her delinquent father. Brandi decides to move in with Peter while Jinx returns and offers Mary motherly advice on dating. Guest starring Joe Spano, Lesley Ann Warren and Joshua Malina.
S4/EP 1 - The Art Of The Steal
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.
S4/EP 2 - Crazy Like A Witness
Mary must help a whistle-blowing witness reconnect with his son as he struggles with a severe case of paranoia. Unfortunately, when you're in WITSEC just because you're paranoid doesn't mean they're not out to get you.
S4/EP 3 - Love In The Time Of Colorado
Mary is forced to be a reluctant go-between in the WITSEC version of a witness Romeo and a suspect Juliet.
S4/EP 4 - Meet The Shannons
Mary helps a Miss Congeniality teenage pageant queen cope when she suddenly realizes that she's spent her entire life in the witness protection program -- but didn't know it.
S4/EP 5 - Second Crime Around
Mary learns that the only thing she despises more than protecting an unapologetic con artist, is having to team up with him in order to take down an even bigger dirtbag.
S4/EP 6 - Something's A-Mish
When Mary's witness is forced out of an Amish community and into WITSEC, learning to adapt is far from her only concern. Even a fish out of water has to worry about sharks.
S4/EP 7 - I'm A Liver, Not A Fighter
Mary must help a terminally ill father heal a tarnished relationship with his distant children.
S4/EP 8 - Kumar Vs. Kumar
Mary plays marriage counselor in order to mediate a WITSEC divorce. Not only must she reconcile a stubborn witness, but also thousands of years of Hindu tradition, in order to save the case and keep a family out of danger.
S4/EP 9 - The Rolling Stones
Mary gets a WITSEC two-fer, when a witness is forced to enter the program after being mistaken for his "evil"" twin brother. Not only must she protect the pair from their enemies
S4/EP 10 - Girls, Interrupted
When Mary’s WITSEC mandated road trip turns into an introspective odyssey, Marshall and Stan are left to deal with a rockstar witness and her overbearing mother.
S4/EP 11 - Provo-cation
Mary helps protect a guilt-ridden army veteran, while butting heads with his JAG attorney. Unfortunately for Mary, things are further complicated by the return of her ex-husband.
S4/EP 12 - A Womb With A View
Mary learns all the joys of childbirth while protecting a courtesan from the gangster that impregnated her. Although Mary may be immune to her charms, can a seductress truly ever be trusted?
S4/EP 13 - Something Borrowed, Something Blown Up
On the day of her sister's wedding, Mary is flown to Miami in order to protect her least favorite witness from hired mercenaries.
S5/EP 1 - The Anti-Social Network
Mary returns to WITSEC from maternity leave to find a new set of office dynamics. She must protect a witness who could take down one of the most powerful secret societies in the country.
S5/EP 2 - Four Marshals and a Baby
Mary must juggle WITSEC with her new childcare duties after a hoarder witnesses a violent murder.
S5/EP 3 - Reservations, I've Got a Few
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.
S5/EP 4 - The Merry Wives of WITSEC
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.
S5/EP 5 - Drag Me to Hell
Mary must protect a drag queen from reverting back to his old ways while Marshall gets "dragged"" into an undercover sting operation."
S5/EP 6 - The Medal of Mary
When Mary's fugitive father turns up, his return puts Brandi and Jinx in danger. Revelations abound as Mary struggles to determine whom she can trust.
S5/EP 7 - Sacrificial Lam
With Mary's father on the lam and out for vengeance, she finds herself under FBI surveillance. In order to clear her name, she'll have to lose her tail and track down her own father before anyone else does.
S5/EP 8 - All's Well that Ends
In the series finale, Mary finds herself caught between her "model"" witness and an unexpected family reunion