Lommie's talents come in handy for D'Branin; Rowan and Tessia develop a theory about alien life.

Cast: Eoin Macken, David Ajala, Jodie Turner-Smith, Angus Sampson, Sam Strike, Maya Eshet, Brían F. O'Byrne, Gretchen Mol, Bronte Carmichael, Laurence Falconer, Gwynne McElveen, Miranda Raison, Phillip Rhys, Derek Ugochukwu