Cesar helps Joe, whose daughter Sydney has an aggressive pit bull that attacks other dogs. Joe is not only worried that Nani will fatally harm another dog, but that Sydney will try to stop an attack and get caught in the crossfire.

Cesar confronts two women who unwittingly have been triggering aggression in their dogs. Terrier Lexie Jane is the most high-strung hiker in Runyon Canyon, and Rosa, a loving therapy dog, is vicious to other dogs.

Cesar aids Leslie and her son, Si. Their rescued Great Dane, Junior, has became aggressive. Without Cesar's help, the dog could be euthanized. Then he helps sisters, Taylor and Morgan. Taylor's Maltese, Chloe, growls and bites Morgan any chance she gets.

Cesar struggles with two dog park disasters – an ankle-biting monster named Isaboo, and a bulldog bully named Bella.

Cesar takes on an aggressive Weimaraner who bit a neighbor and her dog, and is close to being taken away by Animal Control and put down.

Cesar rushes to the rescue of two dog-aggressive canines: Roxy, the Washington family's beloved pit bull, and Caper, a rascally terrier.

Cesar struggles to train two aggressive St. Bernards that their owner can't control, and a poodle that is ruining a 20-year friendship.

Tasi is out of control and aggressive toward everything. She's also in danger of being put down unless Cesar can help her owners to rehabilitate her. Next, he drops in on Ebbie Lou, a miniature schnauzer that's about to be banished from doggy daycare because of her disruptive, exited energy. Can Cesar calm this canine and get her a reprieve?

Cesar helps a mother whose Wire Fox Terrier is causing her kids anxiety, and a couple whose Blue Heeler can't escape his killer instinct.

Dr. Claude Lessard is a hospital veterinarian whose own pit bull, Opal, is in need of urgent care.

Cesar takes on an aggressive German shepherd whose owner has been banned from his own family functions and a couple whose toy dogs could get them evicted from their apartment complex.

Cesar is called to train an aggressive bulldog who's bitten a couple's son three times and brought their marriage to the brink of divorce.