The Vulcan Mind Meld
"Spectre of the Gun"
The Enterprise landing party faces death in the shootout at the O.K. Corral, an illusion provided by the Melkotians. They will indeed die if their minds cannot accept the affair as unreal. So Spock uses the Vulcan Mind Meld to hypnotise his human companions into accepting the truth without fear. The imaginary bullets pass through their bodies and the illusion ends.
