Vortex Gateway Door

The portable doorway in green light extends between the two time capsules, briefly stabilizing a pocket of twisted reality behind the tea trolley before it snaps shut, yanking the Doctor into the roiling vortex en route to Skagra.

The door to Chronotis' rooms, slightly ajar when Clare reaches it, acts as both barrier and invitation. Its simple brass handle turns too easily in her grip, symbolizing the thin veil separating institutional order from hidden disturbances. The door's creak upon swinging inward marks the transition from public corridor to private mystery.

The Vortex Gateway Door materializes beside Chronotis’ rooms as a green light portal for the Doctor’s crossing, briefly stabilizing reality behind the tea trolley before collapsing violently when Clare’s lever fails.

Romana struggles to secure and then maintain the Vortex Gateway door’s fragile green light portal between Chronotis’s capsule and the TARDIS, aligning it with the altered spatial pocket behind the tea trolley. Its collapse directly coincides with the Doctor’s disappearance into the void, severing the duo’s link to the rest of the crew.

The coat’s return on the peg serves as the only visible remnant of chronology’s repair, standing as proof of restoration for the Constable’s inspection. The coat’s reappearance signals the erasure of temporal rift evidence, completing the Doctor’s undoing of Skagra’s plan.