![](https://image.tmdb.org/t/p/original/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![](https://image.tmdb.org/t/p/w342/dsOGBGdtQ1tcR3SktxHokQwjSO8.jpg)
The Epidemic
When a mysterious epidemic breaks out in the park, Zoe is determined to find out what has caused it so that Lassie and other animals don't fall ill. Zoe soon loses patience with Harvey's scientific approach and his insistence on seeking out proof.
![](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![](https://image.tmdb.org/t/p/w300/yUpoMqUazzi3zMpnbE6grZAsPnE.jpg)
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Other episodes for this season
![Friends Forever (1)](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Friends Forever (2)](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![The Great Scavenger Hunt](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Maiden Flight](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![A Wild Encounter](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Trick Or Treat](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![White Out](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Tresspassing](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![The Blueberry Pie Challenge](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Old Doc Dudley](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Inside The Dam](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![The Precious Gift](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Picture Perfect](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![The Star Attraction](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Mrs. Lee's Secret](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![The Reunion](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![The Epidemic](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![A Rare Sighting](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Like Father, Like Daughter](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Déjà Vu](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Face Your Fear](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![Wild Camping](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![The Visitor Center](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![A Shaky Reputation](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![False Accusations](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)
![The Soapbox Grand Prix](https://image.tmdb.org/t/p/w300/5Yt7ycJWSlqsa5zGdVglvFsJIgZ.jpg)