When the Defenders' associate Dollar Bill created a documentary about the group and aired it on television without their permission, it attracted a group of super-heroes who were interested in joining the group. They were interested in joining because of the Defenders' lack of rules and loose formation. This led to a disaster as the large group of different personalities often clashed and the poor leadership of this large group (led by long-standing Defenders Nighthawk, Valkyrie and Hellcat). Their first and last mission was against a team of super-villains (Led by Libra and Sagittarius) who had joined together. The villains also called themselves the Defenders, using the publicity of Dollar Bill's documentary to give the Defenders a bad name.
Although they managed to defeat the villains, the experience proved to be so haphazard, and disorganized that all the "Defenders for the Day" quit.
- 19 members of Defenders for a Day (Earth-616)
- 4 appearance(s) of Defenders for a Day (Earth-616)
- 1 minor appearance(s) of Defenders for a Day (Earth-616)
- 2 mention(s) of Defenders for a Day (Earth-616)
- 5 image(s) of Defenders for a Day (Earth-616)