A third TV spot has debuted for Jon Favreau's Cowboys & Aliens, the Western meets science fiction adventure, which hits theaters July 29. Check out the TV spot below!

Set in 1800s Arizona, a skirmish between cowboys and Apaches is interrupted by the crash landing of a space ship. The alien commander plans to tame the Old West and enslave everyone, but the cowboys and Native Americans turn their six-guns against the alien invaders.