It was based on John Gardner 's novel Grendel .
Grendel Grendel Grendel is a 1981 Australian animated film written , directed and designed by Alexander Stitt and starring Peter Ustinov .
Grendel Grendel Grendel was based on John Gardner 's novel Grendel .
Grendel Grendel Grendel is a 1981 Australian animated film written , directed and designed by Alexander Stitt and starring Peter Ustinov .