: 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

In this episode, the surgeon Masayuki Ogawa is being sent used toys and money every month. The most "useful" piece of evidence is .

💡 : Fans often discuss this episode because of Conan's noticeably "chubbier" animation style, which was unique to the early production designs.

: Conan notices a saved game file under the name "Ogino Tomoya" .

to stop the culprit in this episode, demonstrating their utility for the first time in a life-or-death situation.

: In the live-action drama version of Episode 7, the critical clue is a pearl from a victim's necklace that fell into the culprit's pants hem. New Gadget : Conan uses Power-Enhancing Kick Shoes Go to product viewer dialog for this item.

Depending on what you are looking for, "useful piece" might also refer to:

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