Challengers of the Unknown (Volume 1) with a cover date of September, 1960.
Synopsis for "The Return of Multi-Man"
Creating an explosion in his cell and being reborn with new power, Multi-Man escapes from prison, earning the attention of the Challengers. Hired by a crooked museum owner, Multi-Man goes to steal parts of a device that will reveal the location of a hidden treasure. Stopping Multi-Man, in the location of a tribe who owns the lost gold, the Challengers recapture him his accomplice, giving the device to the tribe's people, to recover their own treasure.
Appearing in "The Return of Multi-Man"
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Synopsis for "The Lady Giant and the Beast"
While she is working on an experimental chemical, it explodes, dousing June Robbins, causing her to grow to a gigantic size. When the Challengers discover a giant beast, they enlist June's aid to fight off the creature, and to use a shrinking solution on it, causing it to shrink down to microscopic size. Afterwards, June is restored to normal.
Appearing in "The Lady Giant and the Beast"
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