Les Feldick was an Oklahoma farmer and rancher with a special gift for teaching the Bible. His simple and nondenominational approach on the program "Through the Bible with Les Feldick" has reached millions around the world with the Gospel of Grace.
When a naval intelligence officer is tortured and murdered, NCIS discovers that CIA operatives are being killed in the same way; Kensi receives a threatening postcard from David Kessler, the sociopath who is obsessed with her.
Deeks is kidnapped by an associate of Kirkin's who is in need of his help; NCIS investigates the shooting of a militarized dolphin equipped with a Russian microchip; Beale makes Nell an interesting offer.
When the team investigates the murder of a man about to reveal the source of a counterfeiting operation, an old acquaintance becomes their prime suspect and reveals the true reason for her return; Deeks struggles during training.
When Severide's father (Treat Williams) visits, he clashes with Chief Boden over a former colleague's death; Shay makes a decision about Clarice; the mystery about Herrmann, Otis and Dawson's bar is revealed.
Detective Voight shows up, looking to cash in the favor Dawson owes him; Casey's social life takes on a familiar pattern; Molly prepares for the grand opening of Dawson, Herrmann and Otis's bar; Severide faces a threat to his career.
Severide is accused of sexual misconduct; Casey starts to find satisfaction in his personal life; Dawson and Mills face challenges as they try to take their relationship to the next level; the squad faces a harrowing building collapse.
Kidd, Seager and Carver investigate a fire at the city stables; Kylie clashes with some of the firefighters over changes due to budget cuts; Herrmann struggles to keep it together as Cindy's condition worsens.
Boden, Ritter, Herrmann and Kidd work together to take down a local politician responsible for a chemical fire; after his aunt's accident, Gallo worries about their future; Brett steps in to perform Dylan's magic show when he's out of town.