In the TV series, Jax-Ur (played by Mackenzie Gray) was a violent, scarred Kryptonian criminal responsible for destroying one of Krypton’s moons. He was a pure antagonist. However, in Season 11 ’s arc “Argo,” Clark discovers a rogue planetoid—a fragment of Krypton itself—that survived the explosion, hidden in the Phantom Zone. On this fragment lives a small colony of Kryptonians, including the real and a vastly different Jax-Ur.