At the height of the Vietnam War, American troops turned to psychological warfare to win their battles. Praying on Buddhist tradition, American troops broadcast spooky messages from deceased Viet Cong soldiers. Surrounded by an invisible sphere of data, our understanding of the universe depends on signals sent and received. Yet, occasionally, we experience a phenomenon of unknown signals. Phantom Signals explores several strange signals, investigating all possible angles in the hopes of finding an answer. From an infamous Soviet cosmonaut’s last communication to mysterious cries for help over radio, these fascinating mysteries come from all corners of the universe to alert us to what might really be out there.