Issue: #139
Last valuation update: 2026-06-30
Featuring the first appearance of Professor Zoom, the Reverse-Flash! A time capsule sent directly to the future results in the creation of a new menace for the Flash... Professor Zoom! 1st appearance of Professor Zoom as Reverse Flash
First appearances: Eobard Thawne
Creators: Carmine Infantino, Julius Schwartz, Murphy Anderson, Joe Giella, John Broome
Characters: Barry Allen, Iris West Allen, Eobard Thawne