4. Mr. Monk Can't See a Thing

While having his smoke detectors tested at the firehouse, Monk witnesses the bludgeoning death of a firefighter and is then blinded when the killer throws cleaning solvent in his face. As Monk struggles to cope with the possibility that he may never see again, Stottlemeyer persuades him to help investigate as best he can, and he soon discovers that the firehouse attack may be connected to the death of a construction company secretary in a recent house fire.