I've never seen the show let alone hear of it until just now.But I googled ... and came up with this:
DISCOVERY KIDS PROGRAMMING HIGHLIGHTS – MAY 2004
March 17, 2004
ENDURANCE REUNION SPECIAL AIRS MAY 15
On Saturday, May 15, Discovery Kids airs a two-part Endurance Reunion Special, featuring players from the show’s first season. Endurance follows 20 kids as they compete in matches of skill, speed, intelligence and strength that bring out the best—and sometimes, the worst—in players.
The Endurance Reunion Special airs Saturday, May 15 at 2:30 p.m. (pt. 1) and 3 p.m. (pt. 2) (repeats at 8:30 p.m. and 9 p.m.) followed by the first episode of Season Two of Endurance. Endurance airs on the Discovery Kids channel Fridays at 10:30 a.m. and 4:30 p.m., and Saturdays at 9:30 a.m. and 3:30 p.m. Visit discoverykids.ca for more information.
I also searched their US and Canadian sites but neither supply a recap of the "Reunion Show"
So, I believe you probably have missed it.
However as it mentions you can start watching the 2nd season now.
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