Uh-oh! The X-VENTURE Xplorers have to come face-to-face with history's hardest hitting issue when an interstellar guest decides to make a visit! Facing dinosaurs was hard enough, but when it comes to what killed them and their world off, there's only one thing to do- run! Will the gang be forced to endure prehistory's swan song, the greatest hit in Earth's known history? Or will they make their EXTINCTION EXIT?