The Serpent and the UFO Factory

On the verge of finishing their Grail Mission, Brook and the Venusians' encounter with the Time Police reveal a dangerous anomaly forcing them to head to 1975 to determine whether the cause is a young Donald Trump, George Bush or Bill Clinton. Or maybe someone else. But their attempt to solve the mystery only leads to further disruptions which threaten to destroy the very fabric of space/time and their cool threads... or lead to Earth's conquest by reptilians ... or even worse.