Beyond the specific case, this episode is a major milestone for the series' main plot:
Depending on what you are looking for, "useful piece" might also refer to: Detective Conan Episode 7
In of Detective Conan (titled "Once-A-Month Present Threat Case"), the "useful piece" likely refers to a specific clue or plot element that Conan uses to solve the mystery or progress the overarching narrative . 🧩 The "Key Piece" of the Case Beyond the specific case, this episode is a
: Conan drops his guard and acts exactly like Shinichi, even mimicking Sherlock Holmes' deduction style. This leads Ran to notice the uncanny similarities between the "child" and her missing friend. ⚠️ Potential Mix-ups ⚠️ Potential Mix-ups : By checking hospital records,
: By checking hospital records, Conan discovers Tomoya was a patient who died three years ago on February 19th. This allows him to deduce that the sender is seeking revenge on the exact anniversary of the child's death. 🔍 A "Useful Piece" of Plot Development