The Contenders: A Plucky Human Space Captain vs Giant Alien Lizard
When: Star Trek: The Original Series: "Arena" Season 1 Episode 18
The Battle: The Federation made first contact with the species known as the Gorn at Cestus III in 2267, and as these things often go, the encounter soon turned into a misunderstanding, which nearly led to all-out war. Captain Kirk and the Gorn Captain are transported to a desert-like planet where the two are meant to fight to the death in an unarmed battle as a "trial by combat." The superior Gorn physiology quickly gives the Gorn Captain the upper claw, but the inventive Kirk was able to MacGyver himself a decent projectile weapon out of natural elements found on the planet. Kirk’s makeshift weapon was able to swiftly bring the Gorn Captain down – but instead of killing him, Kirk opts to resolve the misunderstanding to prevent a future Gorn invasion.
Winner: James T. Kirk… and all the women of the galaxy