Other mistake: As the Military vehicle jumps off the end of the pier, the engine is heard running at the highest RPMs. But there is no engine to be seen in two shots.
Continuity mistake: As Murdock stands on the deck to dive in the water, he has two bottles of pressurized air on his back. The next shot shows him under water, with only one bottle on the back. The rest of the scene shows him once again with two bottles of air. (00:34:00)
Chosen answer: The "H" stands for Hector. The "M" is never explained in the series.
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