Impeller Room-Control Hall Safety Door

The safety doors between the impeller room and control hall slam shut automatically in response to the Tannoy’s emergency alert, trapping the Doctor and Jamie inside. These doors are the primary obstacle in the scene, physically blocking their escape and forcing them to seek an alternative route through the corridor. The Doctor’s failed attempts to pry them open highlight the doors’ role as an inescapable barrier, reinforcing the seaweed’s control over the rig’s infrastructure. Their sudden closure also coincides with Victoria’s disappearance, suggesting she may have passed through them moments before they sealed.