code: def get_episode_name(self, series, episode_numbers, season_number):
          
          try:
              episodes = self.api.get_episodes(series.get('id'),
                                               airedSeason=season_number)
          except exceptions.TVDBRequestException as err:
              LOG.exception('episodes for series %s season no %s failed',
                            series.get('id'), season_number)
              return None, _as_str(err)
  
          epnames = []
          for epno in episode_numbers:
              epname = _get_epname(episodes, epno)
              if epname is None:
                  epname = _get_epname(episodes, epno, absolute=True)
                  if epname is None:
                      return None, None
  
              epnames.append(epname)
  
          return epnames, None
docs: Perform lookup for name of episode numbers for a given series.
  
          :param object series: instance of a series
          :param list episode_numbers: the episode sequence number
          :param int season_number: numeric season of series
          :returns: list of episode name
          :rtype: list(str)