In 1959, Linville appeared on the long-running CBS daytime drama The Guiding Light as Amy Sinclair, a runaway drug addict whose daughter was nearly taken from her as part of an illegal adoption scam ring. Linville starred in two television presentations of One Step Beyond— as Aunt Mina in the episode "The Dead Part of the House" (1959), and as Karen Wadsworth in the episode "A Moment of Hate" (1960). In 1961, she starred in the Twilight Zone episode "The Passersby". In 1968, she played the Romulan commander in the Star Trek episode "The Enterprise Incident". Other television appearances include Decoy, Alfred Hitchcock Presents, Have Gun Will Travel, Coronado 9, Checkmate, Adventures in Paradise, The Twilight Zone, Empire, Gunsmoke (three episodes), Dr. Kildare, Ben Casey, Route 66, The Eleventh Hour, I Spy, Bonanza, The Fugitive, The F.B.I. (two episodes), The Invaders (two episodes), Felony Squad, Hawaii Five-O (three episodes: season one - "Once Upon a Time", parts I and II; season two, "Kiss the Queen Goodbye"), Kojak, Columbo: Candidate for Crime, The Streets of San Francisco (two episodes), Nakia, Switch, Charlie's Angels, CHIPS, Mrs. Columbo, Dynasty, and L.A. Law.