Colonel George "Mac" McHale is Indiana Jones and the Kingdom of the Crystal Skull (2008).
George "Mac" McHale was a colonel in World War 2 who saved the life of archaeologist and adventurer Indiana Jones, putting Jones into his debt. Indy and Mac went on several adventures together throughout the 1940s. Over the years, Mac's gambling debts lead to him nearly becoming broke and turning coat to the Soviet Union to act as a double-agent for them.
In 1957, Jones and McHale were kidnapped by the soviets and assisted them in stealing a Crystal Skull from Area 51. During this incident, Mac revealed his betrayed to Indy and left with the Russians to hunt down the lost kingdom of Akator. When Jones caught up, Mac joined his group along with Marion Ravenwood, Mutt Williams and Harold "Ox" Oxley.
Within the kingdom of Akator, Mac began stealing gold doubloons to stash in his pockets. When the Soviets used the missing crystal skull to awaken Akator's aliens, they set off in their portal which created a magnetic force that dragged George's stolen gold into it. Jones and the gang attempted to save Mac only for him to have them let him go so they could escape, dying in the portal in the process.