Morbo the Annihilator, voiced by Maurice LaMarche, is the lovable human-hating anchor for √2 News, Entertainment and Alien Invasion Tonight, Good Morning Earth, and other shows on the √2 Television Network. Morbo is an advance scout for a forthcoming alien invasion, but doesn't bother to be subtle about it, often expressing his contempt and extreme hatred for mankind during live news broadcasts and frequently comments on his species' extremely violent invasion plans. He appears to be using his job to gather information about the human race for the invasion still yet to come. He is good friends with President Richard Nixon, however. His co-host Linda seems either blissfully ignorant or entirely dismissive of Morbo's hatred and usually responds with an empty-headed laugh to Morbo's contemptuous outbursts. He is married to Mrs. (Fawn) Morbo, another member of his species.

Morbo's character design is similar to the aliens from the 1957 science fiction movie Invasion of the Saucer Men. Maurice LaMarche often points out in DVD commentary that two of the characters he voices, Morbo and Lrrr, "sound nothing alike", as a running gag.[citation needed] LaMarche asserts that Morbo, being a newscaster, has better diction. The pitch of Morbo's voice was digitally altered lower than LaMarche's original recordings, and that in subsequent episodes, LaMarche simply read the voice lower to match the—as David X. Cohen referred to it—"sub-human level" of the altered tone.