'Find the TVDB name for searching myepisodes with.
myepisodes.com is backed by tvrage, so this will not be perfect.
Return: myepisode id or None'

def _generate_search_value(self, entry):

    search_value = entry[u'series_name']
    if entry.get(u'tvdb_series_name'):
        search_value = entry[u'tvdb_series_name']
    else:
        try:
            series = plugin.get_plugin_by_name(u'api_tvdb').instance.lookup_series(name=entry[u'series_name'], tvdb_id=entry.get(u'tvdb_id'))
            search_value = series.name
        except LookupError:
            log.warning(u'Unable    to    lookup    series    `%s`    from    tvdb,    using    raw    name.', entry[u'series_name'])
    return search_value
