Which Episode Does Mello Die? Exact Chapter, Scene Breakdown, and Evidence
The tactical fallout from Mello's death materialized in Episode 37 ("New World") and Manga Chapter 103, 108. At the Yellow Box warehouse, Light stood confident that Mikami was outside writing the real names of the Japanese task force and the SPK onto the notebook. Light had verified that Near previously tampered with Mikami's notebook, believing Near fell for the decoy.
However, because Mello's kidnapping forced Mikami to retrieve the real notebook from the bank, Gevanni was able to copy the entire genuine journal within a single night. When Mikami peeked through the door and wrote the names, nobody died. Near revealed the authentic notebook with Light's name omitted, exposing Kira definitively.
As Near famously declared, neither he nor Mello could surpass L independently. By joining their distinct methods, Mello's volatile direct action and Near's cold deductive reasoning, they completed what L started. Mello's death was not an isolated defeat; it was the essential sacrifice that cracked the case.