The Doom Patrol #100

Beast Boy shares the painful truth of his origin with the Doom Patrol—how his parents' love and a desperate experiment with a reverse evolution ray saved his life, but transformed him into a green-skinned shape-shifter. Now, as the Doom Patrol confronts a terrifying new threat, they realize the same science behind his transformation has been stolen and twisted by Dr. Weir, who’s unleashing prehistoric horrors on the city.

In this origin chapter from The Doom Patrol #100, Cliff Steele—now Robotman—awakens with a singular vow: to find and destroy the man who put his brain into a machine, unaware that the man he seeks is the very same who saved his life. As his memories flicker between man and metal, the Chief, Niles Caulder, steps into the shadows, his motives as complex as the body Cliff now inhabits.