Strips 2655-2726 (July 7, 1947 to September 27, 1947)
Dr. Oglivie has stumbled upon a small quantity of a natural youth-restoring serum.
It is up to Superman to guard Dr. Oglivie and his serum until he can determine
how to successfully synthesize it. With a lab housed in an underground laboratory,
the staff of the Daily Planet kidnapped, switched vials, and mobs demanding
youth, this is a task even Superman might not be able to handle.