Narrative Connection

"The Doctor's exposure of the Cybermen's weakness to gold (their chest units) clogging suffocating them parallels Tegan's use of a Cyberweapon against one Cyberman, suffocating it through organic violent means. Both reveal that the Cyber are not invincible and both use unconventional weapons against them (the Doctor using an alloy weapon as a means, Tegan using a Cyber weapon as a means). The thematic parallel lies in the unconventional means of neutralizing the Cyber threat — Gold vs Cyber weapon. The cross-scene parallel elevates the theme of unconventional victory against mechanical adversaries."