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. more
A break-in threatens the security of the first witnesses Mary and Marshall handled together, prompting flashbacks to the way Mary joined WitSec. more
ATF Agent Wade Guthrie is shot during an undercover weapons deal. When he wakes up, Wade learns he has been protected by Mary Shannon during his three-year coma. It is only his eye-witness testimony that... more
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,... more
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... more
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,... more
FBI 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... more
Seth Mann, a legendary Marshal whose career spans decades and who also happens to be Marshall's father, comes to Albuquerque to work on Operation Falcon, a nationwide sweep of open warrants. Meanwhile,... more
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,... more
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. Meanwhile,... more
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... more
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. Meanwhile, Marshall suspects... more
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. Meanwhile, Stan struggles with telling... more