American Dad! S03 E02 The American Dad After School Special

"From the creator of "Family Guy" comes a man who will stop at nothing to protect his country."

Stan realizes his own weight problem after he criticizes Steve about his new, overweight girlfriend, so he goes overboard with exercising, and develops anorexia. Steve realizes that his overweight girlfriend is the root of his father's problems, and he has to make a hard choice in an effort to save his father's life.