Embedded Player Season Two of Netflix's hit series One Day at a Time premiered recently in late January. Actor Justina Machado, known for her role in the HBO series Six Feet Under, is the star of the show and plays single mother Penelope Alvarez, a retired army veteran. Justina speaks with Maria Hinojosa about growing up in Chicago and what it's like to work on a sitcom that tackles politics and social issues head on.