In 1956, she portrayed Martha Cratchitt in a 1956 episode of The Alcoa Hour called "The Stingiest Man in Town." She performed on The Ed Sullivan Show in 1957, and on The Dick Clark Show on 1958.
Having settled in the United States following her marriage to Kaufman, MacGrath appeared in a number of American anthology television series popular in the 1950s, including The Philco Television Playhouse, Studio One, Lux Video Theatre, The United States Steel Hour, The Alcoa Hour, and Hallmark Hall of Fame.
One of the series' memorable episodes was the December 23, 1956, telecast of The Stingiest Man in Town, a musical adaptation of Charles Dickens's A Christmas Carol, starring Basil Rathbone as Scrooge and Martyn Green as Bob Cratchit.
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