Elizabeth Ann Sheridan (April 10, 1929 – April 15, 2022) was an American actress. While best known for her roles as the nosy neighbor, Mrs. Ochmonek, on the sitcom ALF (1986–1990), and Jerry's mother, Helen, in Seinfeld (1990–1998), her decades-long career was extensive and included work on the stage and on large and small screens. more