Doom Patrol Vol.2 #23 (Key: 1st App. of Red Jack)
Overnight, the temperature outside the Secret Sanctuary of the Doom Patrol dropped dramatically. The unexpected weather change has made The Chief curious, and he plots out the system of equations that represent that weather pattern into a Lorenz Attractor - a graphical representation that resembles a butterfly. He is joined that morning by Josh Clay, who has decided that he will stay with the Doom Patrol after all - but only in a strictly medical capacity. Dismissively, the Chief agrees to the terms, and introduces Josh to another new member: Dorothy Spinner.
Key: 1st Appearance of Red Jack
This title is Suggested for Mature Readers.