As we all know, season 5 was supposed to be the series finale, but the show came back with season 6. Only, season 5 ended with closing down WOOHP, Jerry's retirement and elimination of evil, and season 6 started with evil suddenly back, WOOHP suddenly back to business and Jerry suddenly back from retirement.
You know, a similar thing happened with Martin Mystery. In the season 2 finale of Martin Mystery, the world was saved from paranormal activity and the Center was closed, but the show's season 3 started with paranormal activity suddenly back and The Center suddenly back to business. However, the final scene of season 2's last episode gave a little hint, but it was never brought up. Something like that never occurred at the end of season 5 of Totally Spies.
Maybe something happened between the aforementioned seasons of both shows. Who knows...
What do you think?