Best Mystery/Episode

[Bob2000]

Which mystery from Detective Conan do you like the most?

[Vylash]

Moonlight Sonata

[sonoci]

Moonlight Sonata

^^^

I have a few others, but I can't remember them now

[kkslider5552000]

Night Baron with Furinkazan and some older cases as a close 2nd.

[Wakarimashita]

Bandaged Man Case

[ahrjay]

Moonlight Sonata

This. And then there's File 369-373 with Matsuda.

[briggettkylie]

Episode 345; Head-to-Head Match with the Black Organization! \m/

[Kei.Akai]

Mermaid case.

[MaitreDétective]

Gathering of famous detectives

[dilbertschalter]

304 is the best episode.

There are plenty I could go with for best mystery, but 166-168 is on my mind at the moment. HMs to 118, Moonlight Sonata, and the Red Horse case.

[Commi-Ninja]

Moonlight Sonata is definitely one of my favorites, as well as anything Akai is in.  There are some others as well, but those are the most notable.

[someone somewhere]

most episodes that involves one person - who isn't Kaito Kid -  disguised as another such as Moonlight Sonata, the fake Shinichi murder, and ugh, could someone please help me remember? Haha ^^

[D.]

345,304,the clash of red and black, and everything with sato or akai.

[Mohorovicic]

Moonlight Sonata

^

Also, the Final Screening Murder Case. I don't know why.

[Aokochan]

The clash of red and black, and Metropolitan Police Detective Love Story episodes.