+    def _real_extract(self, url):
+        display_id = self._match_id(url)
+        webpage = self._download_webpage(url, display_id)
+        release_url = self._search_regex(
+            r'video_auth_playlist_url\s*=\s*"([^"]+)"',
+            webpage, 'release url')
+        query = {
+            'mbr': 'true',
+            'switch': 'http',
+        }
+        is_auth = self._search_regex(r'video_is_auth\s*=\s*"([^"]+)"', webpage, 'is auth', fatal=False)
+        if is_auth == 'auth':
+            auth_resource_id = self._search_regex(
+                r"video_auth_resourceId\s*=\s*'([^']+)'",
+                webpage, 'auth resource id')
+            query['auth'] = self._extract_mvpd_auth(url, display_id, 'natgeo', auth_resource_id)
+
+        return {
+            '_type': 'url_transparent',
+            'ie_key': 'ThePlatform',
+            'url': smuggle_url(
+                update_url_query(release_url, query),
+                {'force_smil_url': True}),
+            'display_id': display_id,
+        }
+
+
+class NationalGeographicEpisodeGuideIE(InfoExtractor):
+    IE_NAME = 'natgeo:episodeguide'
+    _VALID_URL = r'https?://channel\.nationalgeographic\.com/(?:wild/)?(?P<id>[^/]+)/episode-guide'
+    _TESTS = [
+        {
+            'url': 'http://channel.nationalgeographic.com/the-story-of-god-with-morgan-freeman/episode-guide/',
+            'info_dict': {
+                'id': 'the-story-of-god-with-morgan-freeman-season-1',
+                'title': 'The Story of God with Morgan Freeman - Season 1',
+            },
+            'playlist_mincount': 6,
+        },
+        {
+            'url': 'http://channel.nationalgeographic.com/underworld-inc/episode-guide/?s=2',
+            'info_dict': {
+                'id': 'underworld-inc-season-2',
+                'title': 'Underworld, Inc. - Season 2',
+            },
+            'playlist_mincount': 7,
+        },
+    ]
+
+    def _real_extract(self, url):
+        display_id = self._match_id(url)
+        webpage = self._download_webpage(url, display_id)
+        show = get_element_by_class('show', webpage)
+        selected_season = self._search_regex(
+            r'<div[^>]+class="select-seasons[^"]*".*?<a[^>]*>(.*?)</a>',
+            webpage, 'selected season')
+        entries = [
+            self.url_result(self._proto_relative_url(entry_url), 'NationalGeographic')
+            for entry_url in re.findall('(?s)<div[^>]+class="col-inner"[^>]*?>.*?<a[^>]+href="([^"]+)"', webpage)]
+        return self.playlist_result(
+            entries, '%s-%s' % (display_id, selected_season.lower().replace(' ', '-')),
+            '%s - %s' % (show, selected_season))