Joan Sanders' husband, doctor Sanders, was murdered by the terrorist Kurt Ostrec. She sought revenge, especially as the Blackhawks had arrested him thrice, and he escaped every time. She wanted a more permanent solution.
To that end, she recruited the widows of several of Ostrec's victims, and formed the Tigresses, an organization modeled on the Blackhawks. Because they could not get to Ostrec while the Blackhawks were still active, she devised a plan that would get rid of them both. She would first coax the Blackhawks to come to Tigress Island, and trapped them. She would then signal Ostrec with this prize. But Ostrec smelled a trap, and attacked her; the Blackhawks escaped and finished the fight. In the end, Tigress failed in her goal; Ostrec was captured, alive. Blackhawk berated her for her foolish actions.
- This version of Joan Sanders (Earth-One), including all history and corresponding appearances, was initially erased from existence following the collapse of the original Multiverse in the 1985–86 Crisis on Infinite Earths limited series. However the ending of Convergence retroactively prevented that collapse, saving all the alternate realities, though in an "evolved" form. Even though versions of the character may have since appeared, this information does not apply to those versions.
- 1 Appearances of Joan Sanders (Earth-One)
- 1 Images featuring Joan Sanders (Earth-One)
- Quotations by or about Joan Sanders (Earth-One)
- Character Gallery: Joan Sanders (Earth-One)