This is the first second season episode to explain that Harriet Cooper is Dick Grayson's aunt with no blood relation to Bruce Wayne.
At the end of this episode Bruce Wayne/Batman celebrates his birthday.
Writer Bill Finger was co-creator of Batman with cartoonist Bob Kane, and wrote Batman's first appearance in Detective Comics #27, "The Case Of The Chemical Syndicate" (May 1939).
This is the only instance of Batman comic writer Bill Finger penning the script of a Batman TV episode.
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