<Li> Sonita Henry as Raika: A member of the Cythonnite sect who was saved by Seg, and later assists him . </Li> <Li> Lukas Loughran as Junra: A member of the Cythonnite sect who is hostile towards outsiders . </Li> <Li> Hannah Waddingham as Jax - Ur (formerly Sela - Sonn): The leader of the Black Zero terrorist group, and Val's former protégée . </Li> <Ul> <Li> Rupert Graves as Ter - El: Seg's father . </Li> <Li> Paula Malcomson as Charys - El: Seg's mother . </Li> <Li> Gordon Alexander as Quex - Ul, the commander of Lyta's Sagitari squadron . </Li> </Ul>

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