Conversation so far:
When did the series Sonic Underground first air?
Sonic Underground first aired in France from 6 January 1999.
Where did this Sonic Underground series air?
Sonic Underground first aired in France and then premiered in the United Kingdom and finally in the United States.
What countries did Sonic Underground air in?
In Australia, Sonic Underground premiered on The Seven Network during The Big Breakfast in 1999 and later re-aired on KidsCo in 2009-2014.

Question: Who produced this show?
Self-contained rewrite: Who produced this Sonic Underground show?