Judith McFarland, Jack's mother, played by Veronica Cartwright. Despite the obvious clues, Judith did not learn about Jack's sexuality until he was 30.

Daniel McFarland, Jack's stepfather, played by Beau Bridges. Daniel always had trouble relating to Jack, due to his athleticism and Jack's lack thereof.

Elliott, Jack's son, played by Michael Angarano. Shortly after learning of his biological father's death, Jack met Elliott - his biological son created from sperm Jack donated at age 17.

Bonnie, Elliott's mother, played by Rosie O'Donnell. Bonnie was at first not happy with Jack taking a role in Elliott's life, until she told him the truth about herself: she is a lesbian.