* ActingForTwo:
** Creator/TerylRothery voices M.O.M. and voiced M.O.M.'s evil former pupil Octavia Paine in the season three finale.
** Creator/SamuelVincent also voices both Martin Mystery and Billy.
* ChannelHop: In the U.S. and English-speaking Canada, it primarily ran on Creator/{{YTV}} and [[Creator/DiscoveryFamily Discovery Kids]] (possibly only in Canada?), but also showed up out of the blue on [[Creator/FoxKids Fox Box]]. After that block folded, Creator/{{Nickelodeon}} picked it up and ran it for a bit. If you count the crossover with ''WesternAnimation/TotallySpies'', you could say the show was on Creator/CartoonNetwork too.
* DisownedAdaptation: Giancarlo Alessandrini, co-creator of the Martin Mystère comic went on record in a 2011 interview disavowing the animated series, defining it as something "very ugly and that nobody liked" and excusing it as a result of compromise determined by the "crisis of the comics" of a "big proposal" to which, despite suffering, "one could say no".
* KeepCirculatingTheTapes:
** A Season 1 DVD set exists, in Canada, and it's exceedingly rare going for $60-$80 each. Though 4 separate volumes do exist, but they're in French only.
** An Italian release also exists, but it's two episodes per disc, and many episodes are out of order.
* {{Vaporware}}: Marathon announced plans to do a fourth season, but it seems to have never materialised.
* WordOfGod: According to the co-creators:
** ''Martin Mystery'', ''Totally Spies!'', and ''WesternAnimation/TheAmazingSpiez'' do share the same universe while ''WesternAnimation/TeamGalaxy'' is a show-within-a-show in their world.
** M.O.M.'s real name is Olivia Lombard and is in fact Diana's mother and Martin's stepmother. She just had that part of her family's memory erased so it doesn't get in the way of running the Center and kept in stasis to restore one day.
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