In 2270, Ensign Walking Bear's Comanche Native American ancestry and keen interest on the history of his ancestors, were instrumental in the Enterprise's encounter with Kukulkan. (TAS episode: "How Sharper Than a Serpent's Tooth")
- TAS episode: "How Sharper Than a Serpent's Tooth"
- TOS novel: Allegiance in Exile
- TOS - Crucible novel: The Fire and the Rose