Gunsmoke (1955)

Season 13: Episode 1

With a well earned vacation disturbed by the arrest of a hardened criminal, Matt and Kitty head back to Dodge. The stage they are on is sabotaged and end up wrecking. Kitty is quick witted enough to switch identities between Matt and the prisoner before the outlaws get to them. Thinking Dillon is dying and Matt is really Monk Wiley, they go on planning to extort money from Dodge to get Dillon back alive.