Judy Wagrowski (Karina Logue) is not your average accountant. She was once hired to keep track of the earnings in an illegal numbers racket in Pittsburgh, PA. After being raided by the feds, Wagrowski was turned over to Wit Sec & Mary becomes frustrated while trying to adjust to Judy’s condition. Unable to lie & struggling with body language, Judy is given a job as an accountant’s assistant while she waits to testify in the federal case. Mary walks a fine line as she instructs Judy to lie about her identity while in witness protection but to tell the truth in the courtroom once she’s called upon to testify against her former boss, Larry Silvers (David Barrera). Marshall & Stan have their hands full as well when a current Wit Sec case becomes worried about her status as an immigrant in the States. Stan puts the pressure on the I.C.E. to renew her status, but he finds out that she may be involved in criminal activity. ...

Wit Sec receives a homeless but genius man who witnessed a homegrown bomb attempt & called the authorities, saving hundreds of innocent people. Walter Cooper (Esteban Powell) once lived off the streets of Seattle Washington & consumed the many books at the library he lived in. But now, Mary & Marshall have to clean up this federal witness to that he’s a credible witness for the U.S. Attorney’s case. After cleaning up, Walter starts a job at a local Albuquerque bookstore where he’s anything but receptive to the idea of an alarm clock, schedule, uniform & nametag. When Wit Sec uses a federal databank to track down a wanted local fugitive on the FBI’s top ten list, Walter gets the idea to use the same method to find his birth mother. Adopted at a young age, Marshall & Mary find out where Walter’s mother is located but must race against time to reconnect the two after they find out that she’s in grave trouble. ...

A teenager witnesses a bloody diamond store heist & she is immediately introduced into Wit Sec protection. However, her mother stays behind & lets her father accompany her. Mary takes the reigns & finds that Sabrina (Spencer Locke), the daughter, is torn between her separated parents who dislike one another. Her mother (Jessica Tuck) barely has any time to see her on planned visitations in Chicago, & her father (Christopher Cousins) thinks he can buy her love with cars & gifts. Mary is left to emotionally guide her as the "stepmother" & make sure that Sabrina makes her federal hearing to testify against the criminals. Meanwhile, Scott’s gambling debts have caught up with him. He ends up in the hospital, badly beaten. He claims that he was mugged & robbed, but Brandi is beginning to think there are other factors at play. ...

Gabriel Adams (Joe Spano) witnesses a stripper’s death when an argument between two sex traffickers spills out into the main club lounge. After his relocation to New Mexico, Gabe eagerly accepts his new role as a bartender. But the more that Mary checks on the priest leading up to his federal case, the more she finds out about his immoral past. Meanwhile, Stan must confront the daughter of a witness, Roy Keels, who has died under protection. She comes to find out more about her father & after lying to her about his character, she finds out that he was nothing but a "petty" criminal. Mary’s personal life is shaken up when Brandi & Peter announce that they’re moving in together. & Marshall & Jinx pressure her to use her vacation days before they expire under new Wit Sec rules. ...

Mary & Marshall's first case together in 2003 is revisited after an amorous couple in Baltimore witnesses the brutal killings of the boyfriend's family. Marshall & a reluctant Mary must transport Henry Doer (Josh Cooke) & Claudia Tobin (Jeannine Kaspar) across the country to the safe haven of Albuquerque. Flash-forward to 2010: Mary & Marshall are rehashing this first case when the couple
- now on the road to romantic ruin
- jeopardises their identities when Henry comes to realise that the romance has died. There's also a new face at Wit Sec headquarters. The newly appointed U.S. Marshall in town Allison Pearson (Allison Janney), doesn't make a very good first impression with Mary. Mary's sister, Brandi (Nichole Hiltz), is struggling to have her tuition check refunded. & Peter even offers to help her financially, but Brandi has plans of her own.

...