public function get($season, $episode)
 {
     $episode = Episode::with(['doctors', 'companions', 'enemies'])->where('season', $season)->where('episode', $episode)->first();
     $ratings = Rating::getRating('episode', $episode->id);
     $comments = Comment::where('item_id', $episode->id)->where('item_type', 'episode')->with('user')->orderBy('created_at', 'desc')->get();
     return View::make('items.episode', ['episode' => $episode, 'ratings' => $ratings, 'comments' => $comments]);
 }