 Because Gary s Olde Towne Tavern is advertising heavily, Sam and Rebecca decide to hire an ad company to write a jingle as advertisement for the bar. As Rebecca has only $200 to spend on such, the ad company foists Sy Flembeck, their resident hack writer, onto the Cheers account. Sy is not very creative or original. All his jingles are placed to the tune of Old MacDonald Had a Farm, and spell out the establishment s name in place of "E-I-E-I-O", even if there are more or less than five letters. But Sy s approach to jingles may actually have the desired if unintended affect of good advertisement. Meanwhile, Maggie O Keefe has come back to Boston and wants to see Cliff. Once Cliff sees Maggie, he faints: she s pregnant, supposedly with his child. However, he confesses to Sam that it is not his child since he and Maggie never made love. After confronting Maggie and getting the true story from her, Cliff decides to marry Maggie anyway, even though everyone in the bar knows he and Maggie never had sex and thus knows the baby isn t his. However, Maggie finds out that Jerry, the real father, wants her back and she runs off back to Canada. But before she leaves, she does tell Cliff that he really could have been the father...