The Clampetts take Jethro to Mrs. Drysdale's psychiatrist for an assessment so that he can pass the fifth grade; when Pearl accompanies him, she is worried about being asked to lie on the couch.
Jethro is finally told that he can finish the fifth grade by Doctor Twombly, but the doctor still wants to see Grannie; her love potion for Pearl misfires, leaving Twombly confused.
Jed takes over Drysdale's job for one afternoon and wins him the Banker of the Year title; Drysdale accidentally uses the wrong speech for his conference, and a new teller makes an impact.
A member of a powerful gang murders a shopkeeper; the deputized Cartwrights sentence a murderer to hang at dawn when the leader of the gang kidnaps Ben and holds him hostage.
When their parents die while crossing the country in a wagon train, the orphaned Segar children are left to fend for themselves, with only the wagon master for protection.
A British sailor who falls for a woman incurs the ire of her father and becomes banished from California; he faces a powerful storm while diving for pearls.