Star Trek Klingons must be based on this film
First, thanks to This TV for broadcasting the movie. I've never seen it before, which is amazing since its a good movie with great action and production values.
So much of the film touches on cultural elements later borrowed by Gene Roddenberry for the Klingon characters in star trek that I'm sure he saw the movie before writing it all down. Uncanny similarities.
Check it out if you haven't seen the Vikings before. Great movie.