According to special make-up designer Nick Maley, the special effects character of the Beast was "the first self-contained animatronic suit... providing not only facial movement but also lung, heart and body-fluid movement all without a single external cable! . . .The Emerald Sear transformation puppet, which was intercut with a non 3-D transformation make-up, attracted the welcome attention of the great Dick Smith".
The movie has been notable for featuring early screen appearances of Liam Neeson and Robbie Coltrane.
The cyclops says that fire mares can travel a thousand leagues in a day. A league was defined as the distance a heavily armed man could travel in an hour, usually 3 to 4 miles (4 to 7 kilometers). That means fire mares can travel about 3,500 miles (5,000 km) a day, at an average speed of about 145 miles an hour (250 km/h).
The dub for the death screams of the Slayers was taken from the Mahar shrieks in At the Earth's Core (1976).
A short behind-the-scenes promotional documentary about the making-of the film was made for television. Entitled Journey to Krull (1983) it is now available on the DVD for the movie.