Doctor and Brigadier split forces to stall Finch

Detonation wires snake from the explosives in the cupboard across the floor to the stairs where the Doctor triggers the detonator, serving as the critical conduit for the explosion that rips open the hidden passage beneath.

The concealed passage stairs descending from the exploded cupboard floor become both the object of the event’s action and the threshold to their ultimate objective, their steep stone steps waiting to bear the Doctor’s weight into the conspiracy’s depths.

The cleaner’s cupboard functions as the explosive device’s storage and staging point, its fragile floor holding back tons of earth until the Doctor’s command breaches it, converting an ordinary janitor’s closet into the aperture for their assault.

The Doctor’s compact detonator, brass trigger locked and wires protruding, is the single device that bridges the human command with the explosive force, translating strategic intent into immediate kinetic impact.

The explosives packed within a sturdy duffel are transported from the cleaner's cupboard to the stairway threshold, their wires carefully arranged before the Doctor triggers detonation with the handheld device. The blast utterly destroys the cupboard floor, fusing the passage entry point.

The abandoned station provides a dimly lit battleground for the final distraction, its uneven platform edges and flickering fluorescents turning the Doctor’s planned explosion into a chaotic spectacle amidst crumbling plaster and discarded debris. Surveillance monitors pulse elsewhere, tracking Grover’s temporal distortions overhead.