|Season 4, Episode 6|
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|Next||The Family Secret!|
Spring Fever! was episode 40.
Bert falls in love with Lisa, Bentley's older sister, when she comes to visit the Evergreen Forest. After much procrastination, he gets a date with her. But will Lisa return his feelings? Meanwhile, Cyril Sneer must choose to attend a camp reunion with Cedric or meet infamous tycoon J.P. Gordon.
Bert develops a crush on the gorgeous Lisa Raccoon and seeks to do all types of things to please her. In fact, he even shuns activities he's previously enjoyed. While Lisa encompasses virtually all of his thoughts, Cyril has designs of cutting a deal with his idol, J.P. Gordon, who is staying at Knox's house. Bert tries to do all he can to impress her and visualizes himself as her hero. Meanwhile, Cyril continues in his futile attempts to get near to Gordon.
Finally, Bert is heartbroken as soon as he realizes Lisa doesn't feel the way about him that he does about her. Nevertheless, a sliver of hope remains for him as Lisa sends him a letter, calling him a "friend always".
- First appearance of Lisa Raccoon, voiced by, and named after, series featured vocalist Lisa Lougheed.
- First and only appearance of Cyril Sneer's idol, J.P. Gordon, voiced by Marvin Goldhar.
- The dragon in Bert's fantasy looks slightly like the title character in "The Railway Dragon" and in its sequel "The Birthday Dragon". Coincidentally, Sheldon S. Wiseman, executive producer of The Raccoons, also executive-produced The Railway Dragon, and the same animators of the series worked on the movie.
- It appears that Lady Baden Baden has a dog as it is heard growling at Cyril but the dog has never been seen or mentioned.
- It is revealed that Lady Baden Baden has Cactus in her garden as Cyril had fallen on it and later the pigs are seen removing parts of the Cactus from Cyril's behind and Cyril is heard saying 'Of all the plants in the world, Lady Baden Baden has to grow Cactus'.