
Homer and Marge with their pet Martian.
Martians are aliens that are Inhabitants of Mars, that can have 1 or more eyes.
In 2039, Homer and Marge went to Mars with Martian Vacations. They adopted a Martian in late 2039 or early 2040, which appeared with them the next year.

The Stonecutter Alien.
Appearances []
Simpsons short – "Space Patrol" (Mentioned)
Episode – "Homer the Great"
THOH – "Treehouse of Horror X"
Episode – "Holidays of Future Passed"
Comic book – The Immigration of the Body Snatchers