What actors and actresses appeared in Seth Mattsonin tarina - 1979?

There seems to be a misunderstanding. There is no known movie or TV show titled "Seth Mattsonin tarina" from 1979.

It's possible that:

* The title is incorrect or misspelled: Could you double-check the title? Perhaps it's a different spelling or a slight variation.

* The movie is less well-known: It's possible that this is a film that's not widely known or available.

* It's a TV series: Maybe you're thinking of a TV series, not a movie.

If you can provide more information or context, I might be able to help you find the correct information.