Susan's psychological breakdown due to the TARDIS malfunction, leading to paranoia, violence, and a struggle to maintain her grip on reality.

The TARDIS lurches violently after an unexplained impact, leaving the Doctor unconscious and Ian and Susan disoriented. Barbara, the first to regain full consciousness, tends to Susan, who experiences sharp …

Susan’s psychological unraveling reaches a critical juncture as she confronts Barbara with escalating paranoia, accusing her of deception and suggesting a malevolent presence may be hiding inside one of them. …