Watch the Alpha Dogs in action!
Nat Geo Wild's new series, which premieres two back-to-back episodes beginning Friday at 9/8c, offers a behind-the scenes look at the training of elite police and military dogs. These are no ordinary pups -- unless your dog can leap from a helicopter, rappel down a building, sniff out bombs and take down a bad guy. Their own reward? Playing with a tennis ball!
Check out our exclusive sneak peek from the first episode, in which one trainer explains the power of the dog's bite: