Just Between Friends (1986)
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.
MTM Enterprises logo (1970)
MTM Enterprises "That's All, Folks" logo
MTM Enterprises logo (1971)
MTM Enterprises Production Logo "Rare Variant"
MTM Enterprises INC. Logo Newhart Variant
MTM Enterprises "Last Newhart" logo (1990)
CBS Ent Prods-Bloodworth-Thomason Mozark Prods-Burt Reynolds Prods-MTM Ent-20th TV (1992 2013)
MTM Enterprises logo (1996)