Susan's plans for a picture-perfect anniversary party for her parents come screeching to a halt when she spies her dad having lunch with another woman, and kissing her in an extremely friendly fashion. Trying to duck her mother's questions about her father's unusual behavior, Susan is horrified when Liz inadvertently reveals that she is having an affair. Meanwhile, Jack's intimidating German squeeze, Kate, wants to hang out with Vicki - much to Vicki's dismay, since she's convinced Kate's appetite for danger will ultimately kill Jack, and perhaps some innocent bystanders as well.
Susan reluctantly does a favor for Jack by attending a charity function with Jack, his wife Margo, and her incredibly obnoxious brother. When Susan finally tells the creep off, Margo and her brother storm out, leaving Susan alone to deal with an inebriated Jack, who winds up spending the night on her sofa. But the next day Margo is not quite willing to believe that's all that happened.
Susan tries to put together a traditional Thanksgiving dinner for her co-workers, but everything goes wrong, culminating in an oven that's colder than the frozen turkey. Her luck seems to change when she locates a repairman willing to work on Thanksgiving - but then he drops dead while still inside the oven.