Mary McCormack (Private Parts and The West Wing) stars as Mary Shannon. Her friends and family think she's just a glorified courier, but she's actually a U.S. Marshal, working for the highly secretive Witness Protection Program. Her job is to help relocate federal witnesses. Whether they're career criminals, or just people who had he misfortune to witness a crime, they all share one thing in common --- somebody wants them dead. Co-starring Frederick Weller and Lesley Ann Warren.
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.
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.
When a hot mom on-the-prowl witness is having problems with her brood, Mary soon finds herself playing babysitter to three difficult kids.
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.
An Orthodox Jewish witness, whose estranged wife refuses to enter Witsec, soon finds himself being followed by a mysterious man (Schiff) who answers to a higher authority.
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.
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.
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.
When Brandi is arrested by Agent O'Connor for drug trafficking & murder, Mary races to find a way out for Brandi and the sordid motive for his vendetta.
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.
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.
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 (guest star Martin Landau) from the Philly Mob, to his son's funeral.
A world-class counterfeiter witness - whose girlfriend's infidelity moved her to confess - is suspected in the murder of another "friend", where even the clues seem forged, until Mary and Marshall realize they may be hiding a witness from the government itself.
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. Meanwhile, Marshall doesn't react well when he learns that Mary revealed the true nature of her job to Raphael.
The U.S. Government enlists WITSEC to hide one of Latin America's feistiest political activists, but when the budding Evita moves to a bad part of town, Mary's the one who may not make it out alive..