DC Comics Presents, Vol. 1 #35B

"The Metamorphosis Machine!": Superman and Man-Bat team-up to take on the Atomic Skull and his Metamorphosis Machine at the Fortress of Solitude.

"Whatever Happened to Rex the Wonder Dog?": Rex, the Wonder Dog and Danny Dennis go to Oscaloosa County, Florida. Rex encounters Detective Chimp and the two find the legendary Fountain of Youth. The water from the fountain gives the extraordinary animals renewed youth and vitality.