Len Novak

Len Novak is the father of Zack and Ella, and the former husband of Sarah Pfefferman. She leaves him early on in Season 1 for her former college flame, Tammy, even marrying her and then immediately divorcing. He and Sarah seem to still have feelings for each other; in Season 3, they live together with their children, even though Len is dating a younger, 22-year-old woman, of whom Sarah is extremely jealous. He is portrayed by actor Rob Huebel.