This Star Trek t-shirt features a poster promoting the greatest fight in the universe, which has been named a Duel in the Desert. The image on this t-shirt is advertising a fight to the death between Captain James T. Kirk and the Reptilian Gorn. Gorn appeared in the Star Trek television series episode titled "Arena". A species called the Metrons forced Kirk and Gorn to fight in a "contest of ingenuity against ingenuity, brute strength against brute strength".