When all the fast food restaurants in Springfield become healthy, Homer turns to the last bastion of greasy food for comfort; Lisa must find a good news story when her school radio station is in jeopardy.
Bart ruins Lisa's perfect day out of jealousy and becomes haunted by the manifestation of his guilty conscious. Homer is revealed to be a master chess player which helps him bond with his competitive dad.
After a successful animal rights campaign, all dogs in Springfield are allowed to go where they want and do what they want. Pack mentality quickly kicks in and the dogs of Springfield assert their dominance by threatening the people.