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DC Jun 1942

Detective Comics #64

Detective Comics #64
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1st appearance and origin of Boy Commandos
This issue marked the beginning transformation of the Joker from a homicidal maniac into a goofy character that persisted until Batman #251 when Denny O'Neil and Neal Adams revived the Joker after a four year absence, reintroducing his homicidal side
DC Aug 1942

Detective Comics #66

Detective Comics #66
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1st appearance and origin of Two-Face, Harvey Dent, a district attorney disfigured by acid
[January 2026 - there is speculation on social media that Sebastian Stan will be cast as Two-Face for the Matt Reeves Batman sequel]
1st appearance of Gilda Dent, the wife of Harvey Dent
[January 2026 - Scarlett Johansson rumored to portray Gilda Dent in the Batman sequel]
1st appearance of Salvatore Maroni, the mob boss who disfigured Harvey Dent
DC Jan 1944

Detective Comics #83

Detective Comics #83
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1st appearance of Alfred with a thin build as commonly depicted
Alfred departs for vacation after lamenting his excess weight and upon his return at the end of the story, he is more recognizable as the character that has endured through the decades
Batman's underground hangar is first referened to as the Bat Cave

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