The Last-Minute Reconstruction
The Caves of SteelThe final solution emerges when Baley connects Enderby’s physical disability, the scene image, and the mistaken identity that neither robot analysis nor political suspicion revealed.
increasing
Bearing strength in each event
decreasing
The Unexplained Glasses

The Unexplained Glasses
A small observation
Baley notices that Enderby wears new glasses and learns that the old pair broke shortly before the investigation began. The detail initially appears to explain only his discomfort.
A fact retained
Baley remembers the timing even while considering other theories. The break will later explain both Enderby’s fear and the fatal mistake at Sarton’s dome.
A minor personal detail remains available when larger theories fail.
The Unreliable Witness

The Unreliable Witness
An apparently certain identification
Enderby insists that he knew Sarton and examined the corpse closely. Baley suspects the identification might be wrong, but has no proof and no body to examine because Spacetown cremated it.
A concealed limitation
Enderby’s broken glasses make his claim less reliable than it sounds. His sincere belief in what he saw can coexist with a catastrophic visual error.
The case turns on the difference between confidence and perception.
The Image Revisited

The Image Revisited
A last piece of evidence
Baley displays the recorded image of Sarton’s dome and searches for a physical trace near the door. His argument has reached a point where he needs evidence stronger than motive alone.
A dangerous gamble
He is not certain what the image will show, but continues manipulating the projection while Enderby watches. Baley’s final accusation depends on noticing what the investigators previously overlooked.
The scene is a contest between observation and panic.
Lens Fragments Found

Lens Fragments Found
The image clarifies
Baley spots glass slivers in the door grooves of Sarton’s dome. Their location proves that Enderby was present earlier than he had admitted.
The mistake reconstructed
Baley explains that Enderby’s glasses broke before the encounter and that he mistook Sarton for Daneel. The killing was an intended act of sabotage that became a fatal misidentification.
The fragments join motive, opportunity, and the body’s resemblance.
Midnight Passed

Midnight Passed
The new day begins
The decisive evidence is established just as the agreed day ends and Spacetown’s project is due to close. Baley has succeeded before the deadline that allows Daneel to remain his partner.
A resolution chosen
Enderby collapses under the accusation, and Baley shifts from proof to negotiation. The detective has solved the murder but must now decide what justice should do with the truth.
The climax ends in exhaustion, consequence, and an uncertain future.
During Baley’s first interview with Enderby
During Enderby’s account of seeing the corpse
At 23:42 during the final confrontation
Moments before midnight
At midnight, immediately after Enderby collapses