When Johnny Yuma shows Billy Wallace (actor Eugene Mazolla) the eagle claw that he wears around his neck, Johnny says,
"Billy... see this? It's an eagle claw. Satanta, Chief of the Kiowas gave me this, when he took me into his tribe."
This refers to Season 1 Episode 3, "Yellow Hair", where Chief Satanta made Johnny Yuma his blood brother and said, "Walk as Satanta's brother, among the Cheyenne, the Kiowa, and the Sioux!"