"In One World and Out the Other!" Part 1 of 4. Script by Roy Thomas. Art by John Buscema (breakdowns) and Chic Stone (finishes). Cover by Gil Kane and Al Milgrom. In the middle of Manhattan's garment district, Arkon and the Thing wage a fierce battle as Alicia Masters stands close by. When the two combatants disappear in a flash of lightning, Alicia rushes to the Baxter Building to get help! But when she reaches the FF's headquarters, Alicia finds Ben Grimm safe and sound. What is going on? With the assistance of Lockjaw, the Thing begins his journey to solve the mystery! Cameo appearances by Crystal and Quicksilver. (Notes: Arkon previously appeared in Avengers (1st series) 84. This alternate Earth first appeared in the second story of Fantastic Four 118 and was later designated Earth-721. This issue includes a full-page ad for Hostess Twinkies featuring Captain Marvel vs. Nitro. The letters page contains Marvel Value Stamp series A #32 the Red Skull.) 32 pages Cover price $0.25.