Know a term to get the parent in Views
taxonomy_get_parents_all will do what you're looking for, but I don't believe it's possible in views. 
http://api.drupal.org/api/drupal/modules--taxonomy--taxonomy.module/function/taxonomy_get_parents_all/6

That being said, there's a module that might help you with that. It's called Taxonomy Views Integrator http://drupal.org/project/tvi