For an assignment that requires her to write about her "Most Interesting Relative", Brenda asks her parents for help. Lester suggests his aunt Lucy, who was a woman brakeman. After Mary hears about Sandra's supposed relative who was a Moroccan prince, she searches through an old trunk to find information about an interesting relative of hers. What she finds is that she had an uncle, Corporal Mortecai Hurley, who was in the Civil War's 54th Infantry. She persuades Brenda to re-write her paper on Mortecai. Not to be outdone, Sandra goes to the library and finds out that Mary's uncle Mortecai was actually a "coward" in the war, and deserted his infantry disguised in the flag made to look like a dress. Mary and Lester tell Brenda and she becomes upset. She and Mary talk, and Mary apologizes for making her re-write her paper in the first place. But they decide that since the assignment calls for her to write about her "Most Interesting Relative", she can still turn in the assignment on Mortecai, because although it is embarrassing, it is still interesting. (This episode was taped after the pilot to add additional characters and provide background for those in the pilot episode.)

News of the breakup of her neighbors' marriage has Mary worried that the same thing could happen to her and Lester. Mary plans an evening of romance for her and Lester. Lester buys flowers (at Mary's suggestion) and they try to force romance by going out to eat, dimming the lights, and playing romantic music. But they realize that the only thing that works is by letting it happen naturally and reminiscing about the past. Meanwhile, Sandra has to babysit her 6-year-old niece Susie while her sister Harriet and her husband visit his sick mother. She solicits Mary's advice on what to feed her and how to get her to fall asleep. (This episode was taped after the pilot to add additional characters and provide background for those in the pilot episode.)