Watch Lion Gangland Full Movie Free Online 123Movies. The Serengeti is one of the most brutal environments on the planet. It's also home to the tough Vumbi lion pride. Using ground-breaking new tools (including a lion-proof peeping Tom robot), National Geographic explorers Michael "Nick" Nichols and Nathan Williamson embed with the lions to reveal a never-before-seen view into a world with razor thin margins between life and death.