William Hanna, co-founder and chairman of Hanna-Barbera was in charge of the film's production. Cornelius sees the Flapper-Wing-a-Ma-Thing and becomes amazed by how the Furlings have grown up. Afterward, they go back to the forest to find that it has been destroyed by poison gas from an overturned tanker truck that blew a tire from the broken glass bottle. Abigail risks her own life to save a comatose Michelle, but Michelle's parents succumb to the effects of the gas. Michelle is given the herbs; the next day, she appears unresponsive, but a single tear from Cornelius awakens Michelle from her coma. Michelle asks Cornelius if anything will ever be the same again.
There, they meet the bully squirrel Waggs, and Willy, a tough but sensible mouse who grows a liking for Abigail. A group of humans appear and the animals thinking the humans are going to hurt them , escape through the backdoor of Cornelius' house. At the suggestion of Liz Kirschner, the wife of the film's producer, The Phantom of the Opera's Broadway star Michael Crawford was chosen to play Cornelius. The Furlings manage to get the lungwort after a dangerous flight up the cliff, then steer their airship back for Dapplewood. Cornelius tells the Furlings about his past encounter with humans that claimed the lives of his parents, hence why he is fearful of all human beings.
After getting the eyebright, they discover that the lungwort is on a giant cliff making it inaccessible by foot. . With limited time, the Furlings head off for their journey the next day. He says he needs two herbs to save Michelle's life: lungwort and eyebright. One day, the Furlings go on a trip through the forest with Cornelius, where they see a road for the first time. Members of South Central Los Angeles' First Baptist Church were chosen to voice the chorus accompanying the preacher bird Phineas voiced by Ben Vereen.
Because of time constraints and budget limitations, over ten minutes were cut from the film before its release; one of the deleted scenes featured the voice of Jodi Benson, whose character was removed entirely from the final storyline. Russell is almost gets run over by a careless driver, who throws away a glass bottle that shatters in the middle of the road. The Furlings happily reunite with their families, who are relieved to see that their children are alright. Edgar gets separated from the group and gets caught in an old trap. It is very, very heartwarming.
When one of the workers finds him, the animals are surprised when he frees Edgar and destroys the trap, revealing that the men are cleaning up the gas. Russell suggests they use Cornelius' airship, the Flapper-Wing-a-Ma-Thing, to get to the lungwort. The Furlings go to Cornelius' house nearby for shelter after they find their homes deserted, believing everyone else to have succumbed to the gas. The Furlings' families and many of the other inhabitants arrive as well except for Michelle's parents ; Cornelius promises to do his best on taking care of Michelle. Michelle panics and runs to her home to find her parents, breathing in the gas and becomes severely ill. Cornelius looks at the dead trees in the forest and says to her that if everyone works as hard to save Dapplewood as the Furlings did to save Michelle's life, it will be. But ReelViews' James Berardinelli and the Times Union of Albany found it misleading, hoping instead for the likes of Don Bluth or Steven Spielberg.
Film; Phoenix Animation Studios in Toronto, Canada; and The Hollywood Cartoon Company. . . . .
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