Issue: #10
The Challs' deadliest foe is back again, and it will take everything they've got to put him down or else Multi-Man Rules The Earth! Continued in Challengers of the Unknown v1 #81The Chief recalls how he unwittingly helped General Immortus, and now The Doom Patrol must stop The Man Who Lived Twice!
First appearances: F. Gaylord Clayburn III
Creators: Jack Abel, Rich Buckler, Arnold Drake, Bruno Premiani, Bob Brown
Characters: Ace Morgan, June Robbins, Prof Haley, Red Ryan, Rocky Davis, Negative Man, Robotman, The Chief, Multi-Man, Kra, F. Gaylord Clayburn III, Volcano Man, General Immortus, Elasti-Girl