The TV version of
Bill and Ted's Excellent Adventure and its sequel
Bill and Ted's Bogus Journey. There were actually two Excellent Adventures series, one being
animated and the other being
live action.
The animated one was the more successful, but not by much. It aired Saturday Morning on CBS and featured Keanu Reeves, Alex Winter and George Carlin all reprising their movie roles of Bill, Ted and Rufus. Bill and Ted would use their time traveling phone booth to go through time and get into wacky adventures. It aired for one season in 1990 (before the release of Bogus Journey).
The live action series didn't get the original actors. Instead Bill was played by Evan Richards, Ted by Christopher Kennedy, and Rufus by Rick Overton (note how I'm not hardlinking them because there's no chance anyone would ever search for one of them by name). In this version, Bill and Ted also worked at a hardware store owned by the Keilson family. The show only lasted 8 episodes. It aired in 1992 (after the release of Bogus Journey). Unfortunatly, it was the last Bill and Ted project ever developed, though if another movie would have looked like this it's probably for the best.