<Li> Melora Walters as Wanda Henrickson--Bill's sister - in - law, wife to Joey Henrickson, and sister of Nicki's first husband, J.J. Wanda's psychological problems surface when she poisons people who cross her or her family . (Seasons 1 - 4) </Li> <Li> Bruce Dern as Frank Harlow--Bill's abusive and domineering father, who exiled Bill from Juniper Creek at age 14 . In a strong, perennial, and sometimes violent feud with his wife Lois . </Li> <Li> Grace Zabriskie as Lois Henrickson--Bill's mother . In a long - time feud against Bill's father, Frank Harlow that included attempted homicide . </Li> <Li> Brian Kerwin as Eddie Henrickson--Lois' younger brother, Bill's maternal uncle . </Li>

Who plays bill's mother on big love
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