Although she made frequent guest appearances in various television series, Hagen was unable to resume her film career in starring roles. Her health began to decline and she spent many years hospitalized or under medical care in the 1960s. After appearing with Fred MacMurray in the Disney comedy "The Shaggy Dog" (1959), for the remainder of career she played supporting roles, such as Marguerite LeHand, personal secretary to Franklin Delano Roosevelt in "Sunrise at Campobello "(1960), and the friend of Bette Davis in "Dead Ringer" (1964).