Bill & Ted's Excellent Adventure

With only a few days before their high-school graduation, it looks like air-headed rock star wannabes Bill (Alex Winter) and Ted (Keanu Reeves) are doomed to flunk all their finals. The boys' long-suffering teacher (Bernie Casey) gives them one more chance. If they can ace a presentation on the topic of how a famous historical figure might react to modern times, they will be allowed to pass. If not, Ted's dad will ship the boy off to military school, thereby ruining his plans to form a righteous rock band with his friend. Bill and Ted receive aid from a very unexpected source: Rufus (George Carlin), an Emissary from the Future. It seems that in Rufus's time, Bill and Ted's rock music is the basis of all society, and if their band is aborted, Rufus's world will no longer exist. Thus, Bill and Ted are whisked off in a time machine (actually a telephone booth) to retrieve a few historical characters -- including Joan of Arc, Abe Lincoln, Napoleon and Beethoven -- as "eyewitnesses" for their crucial oral exam.