"There Goes Number 5" served as the second half of a one hour broadcast, a failed pilot for a spin off featuring the Horshack family, marking the debut performance of Ellen Travolta, John's eldest sister, as Arnold's mother, Mrs. Dingfelder Horshack O'Hara (two return appearances). Directing for the third and final time (and acting for the only time) was executive producer James Komack, Arnold's two sisters played by Elyssa Davalos and Andrea McArdle, his brother played by Dean M. Solomon, Susan Lawrence as pretty neighbor Goldie. With his latest father now deceased, Arnold decides he needs to get a job through his Uncle Harry (Komack), while his mother works on finding hubby number six. Pretty rough sledding with Arnold's proboscis challenged by No Nose Bloomberg (Fred Karger). Ellen Travolta's two other appearances were in "The Deprogramming of Arnold Horshack" and "Frog Day Afternoon."