Cartoon Planet is an American television programming block that originally ran from 1995 to 1998 and 2012 to 2014 on Cartoon Network. A spin-off of Space Ghost Coast to Coast, the series centered on Space Ghost recruiting his imprisoned evil nemesis Zorak and his loud and dimwitted archenemy Brak to assist him in hosting a variety show.

Cartoon Planet began as an hour-long block of cartoons hosted by Space Ghost, Zorak, and Brak. They would introduce full cartoons from the Turner Entertainment library, such as old theatrical shorts and Hanna-Barbera cartoons, including the original 1960s Space Ghost episodes (sometimes with an edited laugh-track). The host segments were often original songs and ad-libbed skits. New material ceased being made in 1997, and most of the songs and skits were re-packaged into 22 half-hour episodes without classic cartoon clips.

Each episode included segments such as "Brak's School Daze," "Zorak's Horror Scopes," "Poets' Corner," "Brak's Monday Ratings Report," "The Top 5 Cartoon Countdown" (discontinued in 1997 after the show's Saturday-morning slot was shortened to a half-hour), "Vacation Spots Around the Universe" (pieced together from clips of Ultraseven episodes; at the time Turner owned the distribution rights to a dub created in 1985), "Messages from Outer Space" (also from Ultraseven, featuring the Hot Dog Men), "Mailbag Day", readings from "The Cartoon Planet Storybook," messages from Count Floyd (Joe Flaherty's local public-access television cable TV horror movie host from SCTV; the segments were originally shown on Hanna-Barbera's The Completely Mental Misadventures of Ed Grimley), "Learning to Talk Italian," "Nuggets of Joy from Zorak," "Zorak's Helpful Hints," and "Cooking with Brak."

The show also had short live-action segments featuring producer Andy Merrill wearing an ill-fitting Space Ghost costume doing various things like visiting a petting zoo, getting a haircut (although he kept his mask on), playing tennis, or visiting a gift shop. Intros of the show during the early years featured Merrill in the costume performing an amateur dance to the mambo-style theme music, or sitting in a chair reading a newspaper, falling asleep to lullaby music.

For the first season of the show, the opening and closing theme songs were instrumental excerpts from "No One Knows My Plan" and "The End of the Tour" by They Might Be Giants.

Clips of numerous cartoons from the Turner library would often pop up spontaneously during segments of the show, especially during the music videos. These included Tom and Jerry, Popeye, Tex Avery cartoons, pre-August 1948 Looney Tunes/Merrie Melodies shorts, 2 Stupid Dogs, The Flintstones, The Jetsons, and other classic Hanna-Barbera cartoons. Clips from other Turner-owned properties were used as stock footage as well.

At the time, head writer/producer Pete Smith described Cartoon Planet "as a cross between The Sonny & Cher Comedy Hour, The Electric Company, and recess at the Richard M. Nixon School for Wayward Boys. ...Cartoon Planet skillfully steers clear of any semblance of sophisticated humor. Forced by network muckity-mucks to air his dirty spandex in front of millions of impressionable young minds, Space Ghost dragged a reluctant Zorak and a confused Brak into the treacherous waters of sketch comedy."

Cartoon Planet resulted in three soundtrack CDs: Modern Music for Swinging Superheroes in 1996 (a non-commercial promotional album), Space Ghost's Musical Bar-B-Que in 1997, and Space Ghost's Surf & Turf, the latter two published by Rhino Entertainment) in 1998. The albums consisted of songs and dialogue skits with different background music not used in the show.