diff --git a/youtube_dl/extractor/nrk.py b/youtube_dl/extractor/nrk.py
index 5f43e692f430..60933f069c4c 100644
--- a/youtube_dl/extractor/nrk.py
+++ b/youtube_dl/extractor/nrk.py
@@ -406,7 +406,7 @@ class NRKTVSerieBaseIE(InfoExtractor):
     def _extract_series(self, webpage, display_id, fatal=True):
         config = self._parse_json(
             self._search_regex(
-                (r'INITIAL_DATA_*\s*=\s*({.+?})\s*;',
+                (r'INITIAL_DATA(?:_V\d)?_*\s*=\s*({.+?})\s*;',
                  r'({.+?})\s*,\s*"[^"]+"\s*\)\s*</script>'),
                 webpage, 'config', default='{}' if not fatal else NO_DEFAULT),
             display_id, fatal=False)