The Alphabet Conspiracy examines language and its history. The screenplay was written by Leo Salkin and Richard Hobson. Salkin had worked for UPA (the firm that produced animations for Our Mr. Sun) both as an animator and as the writer for numerous cartoon shorts. The screenplay uses characters from Lewis Carroll's Alice in Wonderland. It was directed by Robert B. Sinclair, who had worked on numerous films and television programs. The cast included Cheryl Callaway (as Judy), Stanley Adams (as the theatrical agent), and Hans Conried (as the Mad Hatter). Daws Butler (uncredited) voiced several characters. The animated sequences were directed by Friz Freleng, who subsequently won the Academy Award for Best Animated Short Film for directing The Pink Phink