The Challengers of the Unknown guest-star as they embark on an adventure through time to enlist Superman's help in defeating a dangerous criminal from the past. Plus, the tragedy of Adam Grant's death sinks in at the boy's funeral.
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The Challengers of the Unknown guest-star as they embark on an adventure through time to enlist Superman's help in defeating a dangerous criminal from the past. Plus, the tragedy of Adam Grant's death sinks in at the boy's funeral.
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