“The Wizard” — Season 9

Jerry and George mess with Elaine by debating the race of her new boyfriend. Turns out her boyfriend is not black — and that he actually refers to them (Elaine and himself) as an interracial couple because he thinks Elaine is Hispanic. Just because someone “looks” Hispanic or black doesn’t mean it’s OK to make assumptions … right?
“The Puerto Rican Day Parade” — Season 9

Nobody likes a traffic jam — but for the “Seinfeld” gang, it triggers chaos. This is the episode in which Kramer stomps on a burning Puerto Rican flag. It caused controversy in 1998 when it first aired and it would definitely cause controversy now. The show pushed the limits even further when Kramer shouted, “It’s like this every day in Puerto Rico!” as he’s chased by an angry mob.