Here's why Seinfeld killed off Susan Ross in season 7. Susan originally debuted on the sitcom in Seinfeld season 4, as an NBC executive hearing Jerry and George's pitch for the Jerry show-within-a-show. She eventually became a love interest for George, and the two had a short relationship over the course of season 4. The pair broke up (an experience that seemingly drove Susan to lesbianism), but surprisingly got back together in Seinfeld season 7. At the beginning of that season, Jerry and George made a pact to get married, and George decided to propose to Susan.
Susan and George were engaged throughout Seinfeld season 7, but the show did not attempt to hide George's misery at the turn of events. During the season, he made it his mission to find a way to get out of his sudden engagement, but didn't have any «luck» until the Seinfeld season 7 finale, «The Invitations.» In that episode, Susan became poisoned by toxic envelopes for the wedding invitations and died as a result. Susan's death on Seinfeld was a shocking turn of events that may have been motivated by behind-the-scenes issues.
Related: The Only Seinfeld Episode George Costanza Wasn't In (& Why)
Susan wasn't the only minor antagonist on Seinfeld. The great part about the show is that loyalties switched relatively often, based on the group's selfish decisions. And anyone who started as a friend in one episode could quickly become an annoyance by the next. Here's why Seinfeld killed off Susan in season 7, and why the show had to get rid of her in the first place.
Actress Heidi Swedberg played Susan on Seinfeld, and based on comments by the sitcom's main cast, she wasn't the easiest performer to work with. In an interview (via THR), George actor Jason Alexander
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