Faster than a speeding bullet. More powerful than a locomotive. Able to leap tall buildings at a single bound. Look, up in the sky, it's a bird, it's a plane, it's Superman! Kellogg's Pet. P-E-P-Pet. Kellogg's Pet, the sunshine cereal presents... The Adventures of Superman. Today, a grave responsibility rests on young Jimmy Olsen. For Walter Green has promised to take him to the leader of the group that so avidly seeks to destroy the fellowship of man. Say, gang, do you know…