From Muppet Wiki

Dog City originally aired as part of episode 104 of The Jim Henson Hour on May 5, 1989 and was later shown on The Odyssey Channel as a stand-alone special without the MuppeTelevision framing segments. It was in this form that it was released on region 2 DVD, where it was marketed as Dog City: The Movie.

The special inspired an animated spin-off series, Jim Henson's Dog City.

Story

The story, inspired by a series of paintings by C. M. Coolidge, and adapted to the film noir genre, follows the exploits of a cast of Muppet dogs featuring Rowlf as the only character to break the fourth wall as a guide to the audience.