First appearance of Professor Clement Holmes.
The first page appears between story pages 12 and 13. The second page is a the back of the comic. Includes letters from (and replies to) Anonymous, Ralph Macchio, Joe Cerniglia, Fred Lee Cain and Ann Nichols, also includes a special announcement from Stan, Roy and Marvel Comics, a small promo for Worlds Unknown #7 featuring Sinbad with an illustration reprinted from the comic and a partial reprint of the cover and Marvel Value Stamp #87 featuring J. Jonah Jameson - image reprinted from Amazing Spider-Man (Marvel, 1963 series) #61, page 13, panel 2.