query: SELECT ?serieLabel (COUNT(?episode) AS ?count) WHERE {
    ?episode wdt:P31 wd:Q21191270 .
    ?episode wdt:P179 ?serie
    FILTER NOT EXISTS {?episode wdt:P345 ?imdb}
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
  } GROUP BY ?serieLabel ORDER BY DESC(?count)