D'Branin investigates the source of the malfunctions; Rowan prepares Thale for first contact.

Cast: Eoin Macken, David Ajala, Jodie Turner-Smith, Angus Sampson, Sam Strike, Maya Eshet, Brían F. O'Byrne, Gretchen Mol, Youssef Kerkour, Zoë Tapper, Bronte Carmichael, Miranda Raison, Andrea Dolente, Aoibhinn McGinnity, Barry O'Connor