After assassinating the real Marcus (Travis Fimmel) and Sue (Niamh Algar) at their residence, they board the spacecraft Heaven, where they find the deceased couple's son Paul (Felix Jamieson).

Back in the present on Kepler-22b, Mother (Amanda Collin) replaces her eyes—the source of her extreme powers—with those of a Mithraic android; she also revives Father (Abubakar Salim) with its heart.

They return to taking care of their son Campion (Winta McGrath), as well as five Mithraic children: Hunter (Ethan Hazzard), Tempest (Jordan Loughran), Holly (Aasiya Shah), Vita (Ivy Wong), and Paul.

Unidentified desert creatures attack the farm but are killed by Mother after she reclaims her original eyes that were momentarily stolen by an untrusting Campion.

Club, Arielle Bernstein wrote that the main theme of "Pentagram" was "whether we have the ability to forge a new identity": "viewers (are invited) to explore if we are merely the products of what came before, or if we are able to ultimately make our own choices."