Hervey returned to acting in 1948 with the film Mickey, followed by Mr. Peabody and the Mermaid. By the early 1950s, she began appearing in television. Throughout the 1950s and early 1960s, Hervey appeared in several television series, including the crime dramas Richard Diamond, Private Detective, Peter Gunn, and Hawaiian Eye. She also made three guest appearances on Perry Mason: in 1958, she played Helen Bartlett in "The Case of the Black-Eyed Blonde"; in 1961, she played Grace Davies in "The Case of the Jealous Journalist", and in 1963, she played Jill Garson in "The Case of the Lawful Lazarus". She returned to theater with a role opposite Hans Conried in Take Her, She's Mine, a comedy written by Henry and Phoebe Ephron, which had regional performances in Massachusetts and Connecticut in the summer of 1963. A reviewer from a local publication noted that Hervey "registers effectively" in her role. In 1965, she landed a regular role on The Young Marrieds, followed by a stint on the short-lived Anne Francis series Honey West as the titular character's Aunt Meg.