This is a classic episode, probably the most outrageous of the series. It kind of takes on a TWILIGHT ZONE feel; Robbie finds out the hard way there is someone --who looks exactly like him(!)-- walking around the campus, and causing all sorts of trouble.
True, it's not an original story, but for the likes of good guy Robbie it's hilarious. Naturally, Rob cleverly retaliates and tries to do the same to his double, called Douglas -- but nothing goes right.
What a predicament to be in!
Interestingly, the "voice" of the fake Robbie is supplied by Mike Minor, best known as Steve on PETTICOAT JUNCTION. The dean is played by old favorite Walter Reed, who appeared in scores of movies and tv shows. He later retired and began a new career in real estate.
Not to be missed, and extremely well written.
From SEASON 6 EPISODE 30 remastered dvd box set.