Bill S. Preston, Esq. (Alex Winter) and Ted "Theodore" Logan (Keanu Reeves).
Bill and Ted are about to flunk history, which will see the two separated because Ted's dad will send him to military school.
How Is It Resolved?
Fortunately for Bill and Ted, they are the future saviours of mankind, so time agent Rufus travels back to San Dimas (and further, to Napoleonic France, Ancient Greece and several other places) to ensure they pass the test.
"Please welcome, for the final report of the afternoon, from all throughout history, some of the greatest leaders who have ever lived, in their 1988 World Tour!"