TV-PG-L. Chief Sanders and Agent Scott investigate citizens whose loyalties are questionable. The young detectives are still curious about the coded message they found. At the hospital, experiments reveal a patient's past.

TV-PG-L. The three sleuths argue about getting involved with the FBI's investigation. Beth is concerned about Frank and the experiments at the hospital. Wallace is caught in the middle when Regina and Hershel argue about what's best for the boy.

TV-PG-LV. Timmy, Arthur, and Madeline make a dangerous and significant discovery, right under the nose of the FBI. While they investigate, Granite Flats is in an uproar—chaos breaks out at the hospital and Chief Sanders pursues Slim.

TV-PG-LV. The town is in mourning the loss of a friend. Regina is grieving and reliving her memories, John can't seem to live with himself, and even Hershel struggles to deal with the tragedy.

TV-PG-LV. The kids' new English teacher (Christopher Lloyd) has a way of making Hamlet applicable to life in Granite Flats. Some citizens are unsettled when a CIA agent arrives (Cary Elwes). Arthur takes his detective work to a new level.

TV-PG-LV. Mr. Hugh Ashmeade (Cary Elwes) stirs up confusion and danger when he meddles in the Andrews’ personal and professional lives and Chief Sanders recruits a new deputy with somewhat surprising results.

TV-PG-V. Arthur continues his investigation alone because Tim and Madeline seem distracted. Professor Hargraves (Christopher Lloyd) counsels Timmy on romance. Hershel becomes the bait in a dangerous trap.

TV-PG-V. Beth, Whittison, and the Andrews turn the tables on Ashmeade and get to the bottom of what he’s been planning. Timmy and Madeline find what everyone has been pursuing, leading Madeline to question her adoption story.