Yours truly hasn't got any affection with the Sword & Sandal whatsoever, but hey, since it's a Mario Bava film, and since I consider him the greatest director of all times, "Knives of the Avenger" somehow became a must-see after all. I stand corrected, though, as this wasn't initially meant to be a Bava-film. It became a Bava-film when the production badly ran into trouble, and he was needed for re-writes and a timely delivery. The fact that one man was capable or replacing a fired director, alter an entire script and finish a reasonably okay film in less than a week proves once more that Mario Bava was the ultimate cinematic genius.
The plot and set-up are extremely simple, but fairly efficient. A mysterious, blond-haired warrior protects a fugitive mother and her son from a merciless gang of outlaws led by the cruel Hagen. The story is supposedly set in the Viking era, but I didn't spot anything (costumes, ships, Northern locations) to emphasize this. Bava worked with what he had available, clearly, namely a fairly good cast (with adequate performances from Cameron Mitchell and Fausto Tozzi) and violent battle sequences. Unless you have - like me - a specific interest in the work of the director, "Knives of the Avenger" is a dull and unmemorable period piece, NOT worth tracking down.