Melmac is a fictional planet from the television series ALF, which aired in the late 1980s. It is depicted as a distant, quirky world inhabited by anthropomorphic aliens known as Melmacians. The most famous Melmacian is ALF, whose real name is Gordon Shumway. The planet is characterized by its unique culture, including a diet that primarily consists of cats, which is a running joke in the series. Melmac is also known for its vibrant colors and unusual landscapes, contributing to the comedic and whimsical nature of the show.