via a spacetime tunnel portal disguised as a sarcophagus, of Sutekh's servant, who kills Namin, now superfluous. The servant is revealed to be Marcus Scarman, now a corpse animated by Sutekh's will. Scarman and the robots secure the estate's perimeter with a forcefield and start hunting down the humans still inside the barrier. Scarman finds and kills Warlock, but is then ordered by Sutekh to prioritize the construction of an Osirian war missile aimed at Mars. Meanwhile, the Doctor disrupts the tunnel using the TARDIS key before retrieving Namin's ring from his corpse. After Sarah suggests they should just leave in the TARDIS, the Doctor takes her and Laurence to 1980 and the devastated Earth Sutekh will leave behind if allowed to escape. There is no choice—they must return to 1911 and stop Sutekh. Once back in 1911, the Doctor makes a jamming unit with Namin's ring to break Sutekh's hold over Scarman and the servitor robots. Laurence, believing this will kill his brother, attempts to stop the Doctor from activating the device, but Sarah Jane stops him. A pair of robots kill a local poacher outside before attacking the hunting lodge. The marconiscope is destroyed in the struggle, the feedback disabling one of the robots. Sarah Jane uses Namin's ring to send the other back to Scarman. The Doctor decides to blow up the partially assembled rocket, and Laurence suggests using the blasting gelignite kept in the poacher's hut. The Doctor and Sarah Jane leave to obtain the gelignite, ordering Laurence to strip the bindings from the deactivated robot. Scarman soon arrives at the lodge, and Laurence (still unable to accept that his brother is truly dead) attempts to rekindle his brother's humanity, but gets strangled instead. After he and Sarah Jane return, they find Laurence dead. The Doctor disguises himself as the disabled robot to set up the explosives before Sarah Jane detonates them with a shot from a rifle. Sutekh telekinetically suppresses the explosion using mental force. Left with but one option, the Doctor uses the space-time tunnel to reach Sutekh and break his concentration, allowing the explosion to destroy the rocket. His escape now foiled, a furious Sutekh interrogates the Doctor before deciding to turn him into a thrall to transport Scarman to the Pyramids of Mars to destroy the Eye of Horus, which maintains his prison. Upon arrival on Mars, Scarman has the Doctor strangled,