When Little Jack falls ill, Elizabeth and Nathan care for him together as Hickam and Mei race to secure medicine. The kids broadcast a baseball game over the radio to lift spirits.

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.

Elizabeth develops a new method of teaching. Nathan goes undercover. A familiar face returns to Hope Valley with an unlucky heiress in tow. Lucas and Lee face their differences.

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

Elizabeth receives a sentimental surprise in time for Little Jack's first day of school. Nathan trains a new Mountie cadet. Rosemary and Lee make a landmark decision.

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.

Allie and Oliver discover a threat. Rosemary invites the kids to debate Lucas on the radio. Bill interrogates a suspect with an old friend's help. Elizabeth fights a cold.

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.

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.

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.

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.

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.