Laboratory rats Mike and Phil enter a love triangle with an imaginary friend; two fleas ponder life while stuck on a monkey's back; an algae questions its existence.

A teenage pigeon's jealousy over his angelic little brother leads him on a wacky spirit quest that teaches him about courage and responsibility; two foxes rap about their tough life on the city streets.

Roaches targeted for extermination venture to the outside world to guarantee the survival of their species; a group of seagulls ensnared in a piece of litter struggles to live as one.

With New York quarantined and in disarray, Squirrels Mike and Phil prepare for their mother's remarriage.

Inside the headquarters of an evil conglomerate ,the unscrupulous dr labcoat prepares to roll out a mysterious cure for the plaguing in New York .

Mike and Phil go into business with fellow rat Simon (Thomas Middleditch) after discovering a secret of his. Elsewhere two bees Todd (Jon Daly) and Stan (Tim Heidecker) find out the secret of pollunation.

HD. 'Episode Seventeen: Cats Part 1.' (Season Two) Rival alley cats fight for power on the streets of Little Italy.

HD. 'Episode Eighteen: Cats Part 2.' (Season Two) New York's alley cats prepare for a final showdown for control of the streets.

HD. 'Animals. 19: Episode Nineteen: Worms Birds Possums.' (Season Two) The food chain is explored through three interconnected stories.

HD. 'Episode Twenty: Dog.' Season Two Finale. An old dog reflects on life; rats Phil and Mike face an unknown future as high school ends.