The Vindicators were a team of assassins sent forward in time by the US government to try to reduce the ape population of the planet, having learned of its fate from Zira and Cornelius. The crew of six consisted of convicts π, Devon, Moriah and Scab, who were offered an amnesty upon their return, astronaut Jo Taylor, seeking to save her father George Taylor, and military specialist MX. They intended to arrive in North America decades before Taylor's arrival and restore a balance of ape/human numbers in order to avoid the destruction of Earth, then return to their own time. In fact they traveled only about a century-and-a-half, and landed in Europe where the humans had already died out through plague. Their crystal-powered ship was destroyed by Cong, and they were stranded without much hope of return.