Tzenketh was an inhabited planet. This planet was the homeworld of the Tzenkethi, a warp-capable species. (DS9: "The Adversary") Elim Garak once conducted a mission on Tzenketh while an agent in the Obsidian Order. During the operation he was trapped when a room's walls collapsed on him, causing an attack of claustrophobia. (DS9: "By Inferno's Light")