In Season 4, Episode 13 (“Dinner Party”), fans witness an incredibly uncomfortable and revealing affair as tension between the two slowly escalates throughout the evening, with Michael thinking Jan might even have poisoned the soup. It turns out some fans think murder might have been on the menu.
u/Beau’s groundbreaking theory speculates that “Jan wanted to kill Michael Scott after he got pregnant.” Also mentioned were several details that support the notion that Jan could be capable of murder, such as her erratic behavior and control issues. The user ended the claim with: “Who says she wouldn’t kill Michael after he undid the vasectomy (snip snap snap snap) for his sperm, inherit his newly renovated condo, possibly life insurance, and with earn more money with their candles for the vigil. I think if Michael hadn’t gone with Dwight he would have been murdered that night.” Referring to the potentially poisonous soup, U/wesleypipes5011 said, “I always thought the poison was a throwaway joke, but you got me straight to it brought to believe that 100%.”
Had the murder played out that way, the show would certainly have ventured into true crime territory and drastically changed the dynamic of the show. But while there’s no definitive evidence to support the claims that Jan could have done such a thing if the circumstances had been different, the actress who played the character has her own thoughts on the episode and the couple.