“Night of the Reaper!” Starring Batman and Robin.
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(Cover Date: December, 1971)
Summary #1: During the Rutland (VT) Halloween parade, Batman & Robin encounter the Reaper, who is involved in a series of murders of former Nazis.
Summary #2: Batman uncovers a foreign spy ring, who plan to blow up a ship to make it look like the USA is responsible.
Comments: The second story is from Detective Comics #37 (March, 1940).