An variant from the 3rd season of The Mary Tyler Moore Show on an episode of Put on a Happy Face, featuring Moore herself replacing Mimsie, She says "That's all folks" in the style of Porky Pig from the end of the Looney Tunes cartoons from 1938 to 1944.
An variant from the last season and episode of St. Elsewhere. This was the saddest logo ever said by fans, from Mimsie flatlining and dying. This is a reference to Mimsie the cat dying in 1988, the same day this episode aired, with MTM Enterprises officially ceasing all operations a decade later. It is also extremely rare, according to the CLG Wiki, and it most often gets plastered by a 20th Century Fox Television or 20th Television logo.