Opportunities in television came as well. Luna has appeared in some 500 television series, including Walt Disney's Zorro, where she was a recurring character in the "Joaquin" arc as Theresa, the Tamale Peddler, the role of Rikki Stevens in the 1958 Perry Mason episode, "The Case of the Sardonic Sergeant", The Wild Wild West as Gatita, The Big Valley as Miranda, Gunsmoke as Chavela (in "He Learned About Women" Episode 21 Season 7), Overland Trail as Estrelita (in episode "Mission to Mexico"), Bonanza as Cayetena Losaro, The Outer Limits as Gaby Christian, The Invaders as Lisa, Hawaiian Eye in three episodes: "The Koa Man" as Susan Chang, "Sword of the Samurai" as Michiko and "Payoff" as Tia Kuno, Hawaii Five-O in two episodes "A Thousand Pardons, You're Dead" as Yoko Collins and "A Lion in the Streets" as Elena Kamoku, Buck Rogers in the 25th Century as Koori, Dallas as Carmen Esperanza, Charlie's Angels as Cynthia Weaver and two guest starring roles on the original Mission: Impossible, as well as a guest starring role in the 1980s remake of that series.

One of her better-known roles was Lt. Marlena Moreau in the "Mirror, Mirror" episode of Star Trek: The Original Series (1967) – a role she still commemorates as a guest of Star Trek conventions worldwide. She has also had roles in the television soap operas Search for Tomorrow and One Life to Live. As Maria Roberts on One Life to Live, her character was involved in the kidnapping of baby Jessica Buchannan, a plot device which was revisited years after Maria's accidental death after being caught by Tina trying to kill Vicky. The Actress also appeared as Marnya on The Man from U.N.C.L.E. episode "The Man from THRUSH Affair".

Between film commitments, Luna remained active in musicals. She appeared as Anita in five companies of West Side Story, including a revival at Lincoln Center in New York City. Her last Broadway show was A Chorus Line in the role of Diana Morales (in the "New" New York cast in 1976). This performance led to the preparation of a cabaret act for her. Its opening night, at Freddie's in New York City, drew rave reviews and led to engagements at the Concord Hotel in the Catskills and at clubs in Atlantic City and Los Angeles.