The Doom Patrol (vol. 1) #91 (Nov. 1964):
“Mento--The Man Who Split the Doom Patrol”
by Arnold Drake, Bruno Premiani

The Doom Patrol (vol. 1) #91

Title: “Mento--The Man Who Split the Doom Patrol”

Medium: comic

Cover date: Nov. 1964

Publisher: DC
Written by: Arnold Drake
Art by: Bruno Premiani

7 characters in this story:

(Click links for info about character
and his/her religious practice, affiliation, etc.)
Pub. #
The Chief The Chief (Dr. Niles Caulder) hero scientist
  The Doom Patrol (founder) DC 176
Elasti-Girl Elasti-Girl (Rita Farr) hero
CBR Scale: U Protestant
The Doom Patrol DC 149
Negative Man Negative Man (Larry Trainor) hero
  The Doom Patrol
[test pilot disfigured in radioactive crash]
DC 154
Robotman Robotman (Cliff Steele) hero
  The Doom Patrol
[mind in robotic body]
DC 211
Mento Mento (Steve Dayton) hero
  Seven Soldiers of Victory; The Doom Patrol...  DC 105
Garguax Garguax villain scientist
CBR Scale: I alien
Brotherhood of Evil
[master of technology, especially androids]
DC 20
The Plastic Men villain group
CBR Scale: I N.A.
[3 plastic-like androids created by alien Garguax] DC 2