Harry Anderson makes his second appearance as the nutty professor Henry Crawford in Disney's The Absent-Minded Professor: Trading Places. While working on yet another formula, Anderson is talked into temporarily trading jobs with his ex-roomate Ed Begley Jr., a research computer specialist. As usual, the professor gets in over his head, and before long he's chased around by all sorts of mysterious characters. The gimmick this time is a "mystery invention" disguised as a tennis ball.
Harry's Mystery Invention Saves the World