Rick knows he will die violently in the end and senses he must complete one monumental task before that happens – to secretly broadcast a bright, momentous laser signal warning unseen aliens how to avoid humanity's tragic decline.
But Rick's fuse is running short. Post-apocalyptic Earth of 2075 is dominated by tech-enriched oligarchs who monitor every human activity and don't appreciate being embarrassed by aberrant citizens like him. (episodes 56 - 78 of 159 in the series)