How she died: Susan (Heidi Swedberg) suffered a lot at the hand of the Seinfeld gang — she was fired from her job her parents' cabin burned down, and even vomited on — but the final indignity came in season seven, when she died licking the toxic glue on cheap wedding envelopes chosen by George (Jason Alexander). After a doctor informed him that his fiance had passed away, an indifferent George suggested he and his friends go for coffee.