Re: Breaking Bad Season 4 Premiere Sun 10pm AMC (Spoilers!)
The symbolism of the dog was really interesting too. Throughout the series, the writers have symbolized Jesse as a dog, being lovable and loyal. This is shown with the episodes "problem dog" and more recently "rabid dog." And of course, Jesse relates his shooting Gale in his rehab meetings as having put down a dog.
As Walt is leaving in the van with his new identity and it goes over the horizon, the last thing we see is a dog crossing the street. I thought that was absolutely a powerful ending to this episode.
"No matter how good you are, you're going to lose one-third of your games. No matter how bad you are you're going to win one-third of your games. It's the other third that makes the difference." ~Tommy Lasorda