The Cybermen force the Doctor, Stevenson and Lester to carry bombs to the centre of Voga while Sarah Jane, Harry and Tyrum decide to contact Vorus.
Quest roles:
Kevin Stoney(Tyrum), Christopher Robbie(Cyberleader), Ronald Leigh-Hunt(Commander Stevenson), Michael Wisher(Magrik), William Marlowe(Lester), Jeremy Wilkin(Kellman), David Collings(Vorus), Brian Grellis(Sheprah), Melville Jones(First Cyberman)