Professor Membrane is a character from the highly-popular Nickelodeon cartoon series, Invader Zim. He is a professor who has his own TV show and lab in the city, and is the father of Dib and Gaz. Like everyone else in his son's vicinity, he doesn't believe in aliens. He calls his son "my poor insane son" but loves him anyway (in a cold, impersonal fashion) and he is hardly ever at home, always working on discovering a new cure or building nonexistent technology. The only time he is supposedly at home is on a night he calls "Family Night" in which he and his children go out to eat at a fast-food restaurant each year.

Professor Membrane's last name IS NOT MEMBRANE. His wife suffered a horrible fate and now her remains live in a jar somewhere. Also, he seems to have had a deep, adult voice and lab coat and goggles even as a child!