Sam Terhune arrives in Walnut Grove looking for work, and finds favor with all of the townsfolk - except for his ex-wife, Hester Sue.
Harriet is pressed to transform the Walnut Grove restaurant into a chain called "Mrs. Sullivan's." Meanwhile, Charles is left to gather the slack at home with Caroline so in-demand as one of the cooks.moreless
When Percival's parents Benjamin and Edna arrive for a visit, Harriet and Benjamin clash miserably over their grandchild's religious upbringing.