In this issue: Jaga and Mumm-Ra face off and not for the first time! Witness the enduring contest between the two iron-willed adversaries down through the ages, from their earliest days to the current battle for the future of Third Earth! Enthusiastic exohistorians DECLAN SHALVEY and JOE MULVEY add an informative new chapter to their archive with ThunderCats #20 illuminated by eye-catching covers from MOSS, SHALVEY, LUCIO PARRILLO, ALFREDO CARDONA, DANIEL SCALISI, and MANIX!