In "Save Our Ship", Bulk and Skull spot a UFO approaching Earth. They end up going to work for Professor Phenomenus, who is constantly on the search for aliens on Earth. The Professor immediately proved to be very odd, but also quite brilliant. The trio's antics frequently saw them crossing paths with the Space Rangers (whenever they were on Earth, of course). Due to the Rangers' adventures often taking them off Earth, and also due to the season's more serious nature, Bulk and Skull appeared in only thirteen of its forty-three episodes, making it the only season of the Zordon era in which they had the least amount of appearances.