When the comic book craze sweeps Hope Valley, Elizabeth teaches her students through nature. Rosemary launches a radio show, and Lucas meets a new political player.

Elizabeth and Nathan uncover Oliver’s secret, and Rosemary worries Lee has a secret of his own. Allie’s interest is piqued when Earl Wyatt returns to town.

Elizabeth helps Allie plan a birthday dance, and Nathan struggles with Allie growing up. Rosemary and Bill team up again to investigate a train robbery. Lucas lends Edie a hand.

Elizabeth and Nathan's date night leads to an undercover operation at a glamorous party. Lucas and Edie grow closer over cards. Rosemary holds auditions for a play.

Rosemary's play gets a new venue and a new cast. Elizabeth takes her curriculum to the airwaves. Faith helps a friend make a decision. Lucas faces unexpected opposition.

The Garrison Gang comes for their gold with Hope Valley residents in the crosshairs. Angela visits the Schwartzman School and Rosemary uncovers the truth about Ava.

The land dispute around McGinty's Meadow intensifies. Hickam and Mei throw a harvest festival for the town. Elizabeth helps Emily find her purpose.

As graduation approaches, Elizabeth and Nathan plan for a happy summer together. Lucas and Edie race Rosemary and Bill to find the gold. The town plans a sweet surprise for Minnie.