I just wanted to add both of Lois' parents were not played by the same people. Jen got it first.
Sam Lane was originally played by Denis Arndt in "Requiem for a Superhero," but was played by Harve Presnell the rest of the way.
Ellen Lane was originally played by Phyllis Coates in "House of Luthor," but was played by Beverly Garland for the rest of the series.
So this means all of Lois' family changed on her. No wonder she had such a tough family life.