After they're outed as polygamists, Barb decides to leave the family while Bill starts an investigation of who leaked the information. Meanwhile, Sarah attends a support group for ex-Mormons

Bill and Don investigate who's responsible for ruining one of the Home Plus advertising signs. Alby gets the police to look into the poisoning case. Meanwhile, Nicki is mad at Bill for his forgetting their anniversary.

Bill and Roman butt heads when Rhonda disappears from the compound. The prosecutor offers Joey a plea bargain in exchange for a confession. Meanwhile, Sarah takes an interest in a boy from her support group.

Bill attempts to sign the deal on the video poker devices before Roman. Joey and Wanda are having a rough patch and Joey wants Barb to help them. Meanwhile, Nicki's upset with the Catholic summer school Wayne is attending. Finally, Bill is captivated by a pretty waitress.

Margene's mother visits the family. Scott has upsetting news about Alby. Meanwhile, a familiar face returns to Juniper Creek.

Bill seeks his wives' advice regarding the video poker business. Barb tries to reconcile things between Sarah and Heather. Meanwhile, Lois seeks revenge on Frank.

Barb finds out that her mother is about to re-marry. Bill hears disturbing news about Weber Gaming. Meanwhile, Nicki is upset by outside influences on her children.

In the season finale, the family prepares for the annual Pioneer Week. Bill and Alby butt heads over the control of UEB. Meanwhile, Margene reveals the truth to Ana.

Bill wants to add a Native American businessman as a partner for his casino and sniffs for a clue of why his family has been snubbed for a big upcoming block party. Meanwhile, Barb would love to add Ana to the fold, and Adaleen has Nicki doing some spying for her. Also, Alby's secret life has gotten him in trouble.

The family dates Ana as a group. Barb awaits test results and takes steps to address Nicki's apparent infertility. With Margene by his side, Bill pursues the casino. Sarah makes plans to go to school out of state, but encounters obstacles. Don is forced into monogamy. Roman attempts to blackmail Bill into finding Rhonda. Frank introduces new wife Jodean to Lois, with explosive results.

Pressed by Coburn to state his intentions, Bill gets his family to stage an elaborate rally announcing his candidacy. He isn't so lucky when an audit uncovers insurance discrepancies caused by his multiple wives. To protect his secret and save his candidacy, he ends up asking Don to take the fall, and moves up his announcement by three days.