Passenger form

Passenger was an associate of Swarm and Azure who accompanied them to the Temple of Atropos on the planet Time. Swarm noted with satisfcation that this meant they were three. Passenger was taller and broader than the two and had no crystalline growths on his skull-like face, which was dark gray. Instead a row of small gems were arranged vertically where his mouth should have been. As a result, Passenger was mute. He seemed to act as a sort of henchman to the siblings, with Swarm using him as a threat against Inston-Vee Vinder, telling him to obey Swarm "unless [he] want[ed] to upset Passenger here". (TV: War of the Sontarans)