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* The substance which blinds Matt is never revealed, but the barrels reveal it to be “TYP A” with the serial number “0464XXXX” – as in April 1964, when Daredevil #1 was first published.
* Van Lunt Real Estate Co.” can clearly be seen beneath their paper plaque – a nod to supervillain Cornelius van Lunt, ‘Taurus’ the leader of Zodiac.
* Madame Gao's drugs have a symbol on them identical to that of Steel Serpent.