An uninitiated rat gets mating tips from his friend at a subterranean party. A pair of police horses complains about an old acquaintance who's made it big. A bed bug has a midlife crisis.

A naive male pigeon prepares himself for motherhood, while another is challenged by a New Jersey rival. One caterpillar's metamorphosis is another's lament.

A papillon is thrust into an unwelcoming dog park. A dog-walking group deals with an unexpected secret. Two dogs dissect their owners' first date.

A rat invents pants. A moth tries neon light for the first time. Two fish couples have a tense dinner.

Pigeon Phil runs into trouble after he's reunited with the dad who abandoned him, while pigeon Mike struggles to encourage his son to be a seagull scout. Two turtles come to blows over the love of a mechanical frog, while a skunk learns the unfortunate truth about his date's past.

A pair of flies experience the highs and lows of life - finding success, failure, love and loss over the course of just a few hours. A self-conscious carriage horse is encouraged to "let it out" by a peer. Bodega-dwelling cats rap.

After their home collapses, two young squirrel brothers find their survival skills tested on a journey through a tree trunk towards freedom, meeting rodent friends and foes along the way. A snake and her mouse prey face off; puppies at a pet store settle a turf war.

The thrilling conclusion of squirrels Phil, Mike and April's treacherous journey out of their collapsed tree home. A queen ant reunites with an old friend and learns what her colony really thinks of her.

After his wife is taken from him, a turkey seeks revenge on the mayor during the Thanksgiving parade. Two rat teens venture out of the sewer and discover the joys and horrors of life above ground. Season One Finale.