The Foundling Gunsmoke : Season 19 Episode 18

After being forced to shoot a man who is breaking up the Long Branch, Matt goes off to be alone only to find a young girl and a newborn in a cave. Neither she nor her parents want the child, and they send it with Matt. Matt finds the only logical choice, Miss Kitty, to deposit the baby with till something can be done with it. Matt decides to give it to the widow of the man he just killed but doesn't realize that Kitty is willing to sell the Long Branch to keep the baby for herself.