Ep 1. The Art of the Steal

In Plain Sight season 4 episode 1, titled "The Art of the Steal," introduces Mary Shannon, a U.S. Marshal who works in the highly sensitive witness protection program. In this episode, Mary and her partner, Marshall Mann, are tasked with protecting their latest witness, who's an art thief named Fabian.

Fabian is in the witness protection program because he has agreed to testify against his own family in a trial that could send them all to prison. To ensure his safety, Mary and Marshall have to keep him hidden in Albuquerque while preparing him to testify in court. However, things quickly get complicated when it becomes apparent that Fabian's family is actively trying to find and kill him, making it difficult for Mary and Marshall to keep him safe.

While protecting Fabian, Mary and Marshall also have to deal with issues from their own personal lives. Mary is struggling with being a single mother and trying to raise her young daughter, Jinx. Meanwhile, Marshall is dealing with his own relationship problems with his girlfriend Abigail, who wants to get married but he's not ready to commit.

As the episode progresses, Mary and Marshall begin to unravel the mystery behind Fabian's art thefts, while also working to keep him safe from his family's threats. They enlist the help of a local art dealer and a former cop who's now working as a security guard in a museum, leading to some tense and thrilling moments throughout.

The show's writing is sharp, with plenty of humorous moments to balance out the tension and drama. The acting is also top-notch, with Mary McCormack delivering a fantastic performance as Mary Shannon, a tough and no-nonsense marshal who's still struggling with her own personal demons.

Overall, In Plain Sight season 4 episode 1 is a solid start to the season, setting up a number of interesting storylines for Mary and Marshall to explore in the episodes to come. Fans of crime dramas will enjoy the show's unique premise and the fantastic performances from the cast.