The arrival of Astrid, Colin and Mary further incriminate Kent, for it was he who took the people down to the bunker in the first place for an "endurance test". Kent and Salamander were allies all along, and the Doctor reveals he had been slow to support Kent because he feared he was being used to topple Salamander for Kent to take over. Kent flees into the cave system beyond the Records Room after they learn the tunnel is planted with explosives. Donald Bruce tries to break into the records room to help the Doctor, but Benik causes trouble, and Bruce has him arrested.