Throughout his writings, Karl Rahner remained open to the prospect that the process of cosmic evolution had yielded sentient life form in other galaxies. He argued against any theological veto on this notion, while also distinguishing the existential significance of such life forms from that of angles. Furthermore, the possibility of multiple incarnations is raised though not affirmed. With its Christological intensity, his theology seems to militate against any repetition of the incarnation. This essay examines some of the arguments for (...) and against the possibility of multiple incarnations, before assessing the current state of the extraterrestrial intelligence debate. In the light of inconclusive scientific findings, the cautionary position of Rahner is reaffirmed. (edited). (shrink)