Alphabet Castle was an educational children's television program produced in the UK. It began in September 1993 with a series of 27 episodes aired on ITV Carlton, and ran until December 1995 and later shown on CBeebies and the CITV Channel in 2006 and 2007. It had three main characters: King Alpha, Queen Bet, and Gobbledygook the turkey. It starred Stephen Cannon and Joanne Campbell.
A total of three series and 65 editions were produced, by Michael Cole productions. Like its near namesake, Alphabet Zoo, a decade earlier, each episode was dedicated to a letter of the alphabet (although this format was dropped for the final series); episodes were generally around 10 minutes in length, and were broadcast in CITV on Wednesday afternoons.