pulsing inside, with a "spacey" sound effect. The ambient lights in the room would usually dim as well. Troy's voice would be heard clearly through the cube with reverberation. Originally, even though everyone was able to hear Troy through the cube, Evie was the only one whom Troy could hear, as the cube was described to be "genetic." This changes in the first episode of season 2, "Evie's Birthday Wish." At the end of the episode, Evie uses her final wish to request that her mother be able to talk to Troy as she can. As a result, Troy could then hear Donna and they could talk back and forth. It was unknown whether the rest of Evie's family could also talk to Troy, but there were other aliens that Troy could hear through the cube, as seen in Season 4 Episode 5 "Evie's Guardian Angel" (an Antaerian was sent to Earth to protect Evie and Donna, and he could speak to Troy via the cube). Guest stars The series featured several celebrities who made cameo appearances on the show, occasionally as themselves. In chronological order of appearances: Ann Miller Norman Fell (as Evie's psychiatrist Dr. Hauser, "The Nightmare", 1987) Scott Carpenter (as himself, "Evie and the Young Astronauts", 1987) Charles Nelson Reilly (as himself, "Dueling Mayors", 1987) Betsy Palmer (as Donna's mother, "Uh, Oh... Here Comes Mother", 1987 and “AKA Dad”, 1987) Tom Bosley (as Troy's father, "Guess Who's Coming to Earth", 1988 and "Around the World in Eighty Minutes", 1989) Jamie Farr ("Go West, Young Mayor", 1988) Richard Kiel (as Norman, "Go West, Young Mayor", 1988) Scott Baio (who also directed several episodes) made a cameo appearance in "Princess Evie" (1988) and "Evie Goes For the Gold" (1989) Lyle Alzado ("Goodbye Mr. Chris", 1990) Mr. T ("New Kid on the Block", 1990) Susan Anton ("Best Friends", 1990) Tiffany ("I Want My Evie TV", 1990) Florence Henderson ("My Mom, and Why I Love Her") Kathleen Freeman (as Miss Ogilvy, Evie's high school teacher, "Educating Kyle", 1991) Episodes Season 1 (1987–88) Season 2 (1988–89) Season 3 (1989–90) Season 4 (1990–91) Opening credits The opening credits for the series incorporated special effects footage from the 1979–1981 series Buck Rogers in the 25th Century. The theme song is a modified version of "Swinging on a Star". Video snippets of parents Donna and Troy show the start of their relationship including the wedding