def get_series_by_id(self, series_id):
        """Perform lookup for series

        :param int series_id: series id of series
        :returns: instance of series
        :rtype: object
        """
        try:
            return self.api.get_series(series_id), None
        except exceptions.TVDBRequestException as err:
            LOG.exception('search for series %s failed', series_id)
            return None, _as_str(err)