Summary Janet gives Kathy Jo a clean bill of health as the rash that had been plaguing her has cleared. Janet figures Kathy Jo was allergic to something that is no longer in her environment. But Kathy Jo's rash reappears when Steve returns from a week long business trip. As Janet doesn't know to what Kathy Jo is allergic, Steve states that they should try to use some deductive reasoning to figure out the culprit. Unfortunately for Steve, the biggest change to when Kathy Jo does and does not have the rash is him. While Janet consults with Dr. Nicholson, an allergist colleague of hers, she suggests an experiment of Steve moving out of the house to see if the rash clears once again while he's away. It does. While they all collectively wait for news from Dr. Nicholson, Steve and Betty Jo have to combat one other issue: the rumor spreading through the valley that the two have separated.

• Comedy
• Sitcom