Allows Conan to perfectly mimic anyone's voice.
But the true significance of this episode lies in its final minutes. As Shinichi and Ran part ways, Shinichi notices two suspicious men in black suits. Driven by curiosity, he follows them—only to be ambushed from behind, forced to swallow an untested poison called APTX 4869, and left for dead. When he awakens, his body has been shrunk to that of a seven-year-old child. When Ran finds him and asks his name, he looks at the names of mystery authors Arthur Conan Doyle and Ranpo Edogawa and invents his new identity: Conan Edogawa.
The first season of Detective Conan (released internationally as Case Closed
Instead of dying, the drug shrinks his body into that of a seven-year-old child.
As mentioned, this introduces the core premise.
This two-part finale to the early production block strips away the comedy from Kogoro Mori. When one of his old university friends is murdered, Kogoro refuses to be the bumbling idiot. Driven by personal grief and honor, he displays genuine investigative skill, showing the audience that beneath the flaws, Ran's father possesses the heart of a true detective. Tone, Animation, and Nostalgia
The subsequent episodes of Season 1 balance two essential tasks: establishing Conan’s new life and introducing the framework for the series’ long-running structure.
The first 28 episodes are essential because they introduce the crucial elements that define Detective Conan :
This episode introduces a stalker who looks eerily like Shinichi. It plays with the identity anxiety that defines the series—could Conan be exposed?
The stalwart, trench-coat-wearing police inspector who relies heavily on teenage and private detectives to solve homicide cases. Iconic Gadgets and the "Sleeping Kogoro" Formula
An Overview of Detective Conan (Case Closed) - Season 1, Episodes 1-28
Season 1 (Episodes 1-28) introduces us to (Jimmy Kudo in the English dub), a brilliant high school detective often called the "Modern Sherlock Holmes." While on a date with his childhood friend Ran Mouri (Rachel Moore), Shinichi witnesses a shady deal between two men in black suits. Caught red-handed, he is forced to ingest an experimental poison—APTX 4869—designed to kill without a trace.
: The legendary "Roller Coaster Murder Case" where Shinichi solves a gruesome crime before his life-altering transformation.
If you are watching the English dub ( Case Closed ), be aware of heavy localization:
What these 28 episodes accomplished was the creation of a world flexible enough to sustain endless variations of the same essential premise, yet deep enough to reward long-term investment.
: Widely considered a masterpiece for its emotional depth and lasting impact on Conan’s character.
The first 28 episodes of Detective Conan (released in the U.S. as Case Closed
As of 2025, availability varies:
A classic "locked-room" mystery set entirely in an elevator. This episode perfects the "one-room, many suspects" formula that Detective Conan would later master.
As the series progresses, the cases become more complex and intriguing. In Episode 6, "The Case of the Mysterious Cat," Conan investigates a series of cat-related crimes. The episode showcases Conan's ability to think outside the box and solve cases that others cannot. Episodes 7-10 continue to feature Conan solving various cases, including a murder at a hotel (Episode 7) and a mystery involving a ghost (Episode 9).