Kirk ignores an alien buoy that warns the U.S.S. Enterprise that it is trespassing into Melkotian space and continues forward when the Melkots transport Kirk, Spock, McCoy, Scotty, and Chekov to a recreation of Earth's wild west. Here their instruments will not function and they are forced to relive, in "a manner befitting their heritage for trespassing," the OK Corral shoot-out in Tombstone, Arizona on October 26, 1881.

James Doohan (Lt. Cmdr. Montgomery Scott)
Ron Soble (Wyatt Earp)
Bonnie Beecher (Sylvia)
Nichelle Nichols (Lt. Uhura)
Walter Koenig (Ensign Pavel Chekov)
Charles Maxwell (Virgil Earp)
Rex Holman (Morgan Earp)
Sam Gilman (Doc Holliday)
Charles Seel (Ed)
Bill Zuckert (Johnny Behan)
Ed McCready (Barber)
Abraham Sofaer (voice of Melkotian)