Cesar Millan and his son, Andre, travel to San Francisco to help locals with their problem dogs and meet some of Dog Nation's heroes.

Cesar and Andre help a traumatised dog rescued from a puppy mill. They also meet a tiny pooch that won't stop biting and a naughty dog that attacks lawn mowers.

Cesar and Andre Millan head to Chicago to meet some local heroes.

Cesar and Andre Millan head to Los Angeles where they visit two dogs rescued from the foreign dog meat trade.