Gemma Corwyn's struggle to maintain control and leadership amidst the chaos and increasing Cybermen threat, ultimately sacrificing herself to warn the others.

The Doctor’s urgent warning—delivered via monitor—triggers a crisis of trust and action in the Wheel’s Operations Room. His directive to seal the airlocks is met with immediate compliance from Ryan, …

The Doctor’s desperate attempt to warn Gemma Corwyn comes too late—she is executed by a Cyberman mid-transmission, her death silencing critical intelligence about the Cybermen’s weaponization of the Wheel. Meanwhile, …