[4] In 1953, she completed her early education at the Lankenau School for Girls in the Germantown District of Philadelphia and then moved to New York, where she attended the American Academy of Dramatic Arts, graduating with honors.

[6]: 1189 Randall appeared in other television productions before portraying Ruthie Saylor, a reference-desk worker, in the 1957 film Desk Set starring Spencer Tracy and Katharine Hepburn.

She appeared in 28 episodes of the popular sitcom after replacing Diane Brewster, who played Miss Canfield during the first season and in the 1980s television movies based on the series.

[8] In the pilot episode's storyline, described by one later reviewer as "painfully unfunny", Randall and Davitt's characters insult passengers and frighten them while in flight by mistakenly preparing their plane for a crash landing.

[9] Randall appeared in other series, including CBS's The Twilight Zone, Have Gun – Will Travel, Gunsmoke (as “Laura” in S7E9's “Millie”, and as "Effie Strayhorn" in S6E14's "The Cook"), Bat Masterson, The Aquanauts, Pete and Gladys, Ichabod and Me, and Hennesey, NBC's Bonanza and The Man and the Challenge, and ABC's The Real McCoys, The Dakotas, 77 Sunset Strip, The Fugitive, and The Rifleman.

[2] She participated in telethons and other local events to raise money to support programs and research battling arthritis, multiple sclerosis, and blindness, and providing poor children with a better education.