Lassie

When Graham informs Sarah that the bat colony living in the gulch is behaving strangely, Zoe, Harvey and Lassie set out on a recon mission to find out why. Sarah also joins the kids and as they climb down into the depths of the gulch, Sarah has to face her biggest fear.

Zoe's beloved aunt Kim is passing through the valley and surprises Zoe by taking her camping with Harvey and Lassie. On the way, Zoe insists they set up camp higher in the mountains to be closer to the stars. Kim acquiesces on the condition that the children take great care because the trail to the new destination can be perilous. After a night under the stars, Kim is bitten by a snake.

Thanks to Lassie, the children avoid a landslide on the hill overlooking the visitor center. Looking down they realize the building has been damaged. With the center now closed for safety reasons, Beth has no choice but to take new work away from the park. While Zoe and Harvey are crestfallen at the prospect of their separation, Lassie gives them hope.

Zoe, Harvey and Lassie try to stop Samantha and Nick exploring an old gold mine whose access has been re-opened following an earthquake. Zoe and Lassie end up trapped with Samantha at the bottom of the mine. Here Samantha confesses that she had come in search of a stolen statue to save her father's honor.

Harvey enters a science competition and comes up against Samantha whose project has as its centerpiece a family diamond. When the diamond disappears, Lassie becomes the suspect. Fortunately her friends, and Harvey's ingenious invention, save the day!

Business at Mrs. Lee's store takes a hit when the hotel opens a new boutique. Zoe decides to enter the Park soapbox race emblazoned in the store's colors to help advertise Mrs. Lee's shop! But racing against her arch-rival Samantha, Zoe and Lassie have their work cut out for them to stay in the race.