The story of "Captain Thunder and the Holy Grail" is set during the Third Crusade in Palestine, when Captain Thunder finds in the dungeons of a fortress a dying Christian named Juan de Ribera, who entrusts him the mission to restore to Spain a cup which is the Holy Grail, stolen from an ancient order. Thunder, with his inseparable friends Crispin and Goliath, and a Viking princess named Sigfrid, will face an evil feudal lord and his black "devils", who are terrorizing the population of low Aragón.
Practical Effects
Charming handmade costumes that look like Renaissance faire leftovers
Stunts
Earnest sword fights performed with visible enthusiasm if not skill
Director
Antonio Hernández
Trivia, insights & behind the scenes
Capitán Trueno was a massively popular Spanish comic strip from 1956-1968, essentially Spain's answer to Prince Valiant with Franco-era nationalist undertones.
This film bombed so hard it helped kill plans for a planned trilogy—meaning we'll never see Crispín and Goliath's promised spinoff.
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