In Plain Sight (US): Season 4, Episode 13

4 - 13: Something Borrowed, Something Blew Up

With Brandi's wedding to Peter (Joshua Malina) quickly approaching, Mary and Marshall are forced to protect a witness (Maury Sterling). After the marshals discover the body of a juror, they are ambushed by gunmen and are subsequently trapped without communication. With tensions rising, the marshals discover the four gunmen, killing all of them. At the wedding, Mark (Bryan Callen) attempts to console Brandi, who becomes very nervous. Upon Mary's arrival at the wedding, she discovers that Brandi has left Peter alone and is running away. Mary soon goes into labor.