Another version was comprised of villains whose missions often resulted in a body count, with members including Catman, Deadshot, and Cheshire.
A second incarnation debuted in 1988 and saw the introduction of a whole new group of heroes after the previous batch died.
The first incarnation of the Secret Six team was comprised of a group of undercover operatives brought together via blackmail by the mysterious Mockingbird, and they made their debut in 1968.