MTM Enterprises was the production company founded by Mary Tyler Moore and Grant Tinker in 1969, and its closing logo became one of television's most recognisable trademarks: a kitten named Mimsie meowing inside the company initials. The variant heard here closed episodes of Bay City Blues, the short-lived 1983 NBC baseball drama. Logo enthusiasts have catalogued dozens of MTM variants over the years, and the meow has lived on in memes and parody videos as instant shorthand for vintage television, joining sounds like the Law and Order dun-dun as a four-second joke that says a show has officially ended.