Groucho makes an uncredited cameo at the end of the episode.
This was the last time the three main Marx Brothers appeared together on film. Chico died two years later, followed by Harpo three years after that.
There is only one line of dialogue in the whole show, spoken by Groucho at the very end.
Art Gilmore was the substitute host for this episode when it originally aired. But when the show was shown in re-runs and when it's seen on home video/DVD, the show's regular host, Ronald Reagan, was inserted taking over the hosting job.