<Li> Todd Grinnell as Dwayne Schneider, the rich landlord of the building . He is a close friend of the family and Penelope's best friend . Schneider is frequently having one - night stands with different women . Often in the series he talks about having multiple stepmothers and how dysfunctional his family was, while also occasionally discussing his history of addictions . He is Canadian and after years of having a green card decides to become a US citizen . </Li> <Li> Stephen Tobolowsky as Dr. Leslie Berkowitz, Penelope's boss and Lydia's love interest . </Li> <Ul> <Li> Fiona Gubelmann as Lori (season 1): Penelope's co-worker . </Li> <Li> Ariela Barer as Carmen (season 1): Elena's best friend . She spent nights with Elena in her bedroom after her parents were deported back to Mexico, but Penelope finds out . She later moves to Austin, Texas to live with her brothers . </Li> <Li> Froy Gutierrez as Josh Flores (season 1) </Li> <Li> Eric Nenninger as Scott (season 1--present): Penelope's co-worker . </Li> <Li> Haneefah Wood as Jill Riley (season 1--present): Penelope's friend . </Li> <Li> Mackenzie Phillips as Pam Valentine (season 1--present): the leader of Penelope's female veteran therapy group . </Li> <Li> Judy Reyes as Ramona (season 1--present): Penelope's friend from the therapy group . </Li> <Li> Tony Plana as Berto Riera (season 1--present): Lydia's late husband . </Li> <Li> James Martínez as Victor Alvarez (season 1--present): Penelope's ex-husband . </Li> <Li> Ed Quinn as Max Ferraro (season 2): a military veteran, EMT, and Penelope's ex-boyfriend </Li> <Li> Sheridan Pierce as Syd (season 2--present): Elena's girlfriend who is non-binary . </Li> <Li> Raúl Castillo as Mateo (season 3): Penelope's friend from school who is also a parent </Li> </Ul> <Li> Fiona Gubelmann as Lori (season 1): Penelope's co-worker . </Li>

Who plays the dad on one day at a time