Seinfeld wasn’t exactly known for its big twists or dramatic reveals. Like, there was never an episode in which Elaine confesses that she has a secret opium addiction but used her love of poppy-seed muffins to cover it up.

That being said, this week marks the 30th anniversary of one of the show’s only true bombshells: the disclosure of Kramer’s first name.

Season Six’s “The Switch” aired on January 5, 1995. In addition to Elaine’s quest to reclaim Mr. Pitt’s tennis racket, and Jerry’s attempt to hook up with his girlfriend’s roommate, the episode featured one of George’s most repugnant storylines. In an effort to discover whether or not his model girlfriend is bulimic (out of “concern” that he’s wasting money on expensive meals), George enlists the help of Kramer’s estranged mother, who happens to be a restroom attendant. But when...