This week on the season finale of "Cesar 911," I help people and dogs with dog park challenges. Here's a sneak preview of one of the cases. Be sure to watch Friday at 9:00 p.m. E/P on Nat Geo WILD! | Cesar Millan

It's been quite a season. Lots of intense stories, tough cases, tears, lessons, and laughs. I hope you'll end the journey with me by watching the finale tonight, and sharing what you've learned. 9/8c on Nat Geo WILD. #Cesar911 | Cesar Millan

Do you have an overexcited dog? You don't want to miss the tips in an all-new #Cesar911 ep. First-aired March 13 on Nat Geo Wild! | Cesar Millan

Double trouble on the next episode #Cesar911. First, I help a retired policeman and his golden retriever with separation anxiety, then I work with a couple who manages an apartment complex but can't manage their dog. Friday 9/8c on Nat Geo Wild. | Cesar Millan

In this Cesar911 Episode, I help a family whose dog barks at everything! The mom's son, Mason, is scared to even enter the house because the dog makes him feel uncomfortable. He is afraid that the dog, Buddy, will lash out. #betterhumansbetterplanet Full Video: https://youtu.be/1ln5lpH5Nf0 | Cesar Millan

In tonight's episode of "Cesar 911" I show how the combination of a fearfully aggressive dog and a timid owner creates a vicious cycle. It's up to the human to step into the leadership role to resolve the problem. Watch tonight at 9/8c on Nat Geo Wild. | Cesar Millan

How To Properly Walk A Dog. In this clip from Cesar 911, I teach a dog owner how to better control her dog on a leash. The first step is teaching her how to properly walk the dog. The key is to have no tension on the leash unless it is required that way there is no anticipation of bad behavior. Remember: aggression is the symptom, not the problem. First figure out the problem and then symptom will resolve itself. | Cesar Millan