Adventures of Superman comic books issue 484
Part 1 of the 5-part 'Blackout' storyline in all the Superman titles, continued in Action Comics (1938 DC) #671. The mysterious Mr. Z returns to Metropolis and, with the help of Professor Hamilton, succeeds in entering the darkest corners of Superman's mind. Unfortunately, a mishap leaves Z and Superman suffering from amnesia. Script by Jerry Ordway, with art by Tom Grummett and Doug Hazlewood. Cover by Ordway. Cover price $1.00.