A few months back I said they needed the 2 hour episode for the first leg because they would need more time than usual for introductions. That's because I knew it was 22 individuals and not 11 teams and that the starting line task and picking teams would take time. Apparently I was wrong about the need for 2 hours since they are scheduled for one hour (unless they break the first leg into 2 episodes, the starting line stuff and then the first destination). I didn't want to spoil it for you so I was being vague and cryptic.
At the time the contestants were being spoiled (not my doing), my impression was that the cast was heavily weighted towards military, policemen and firemen, but watching the introductory video, it didn't seem that way. I'm looking forward to this season, even though I expect there will be a few teams that are bickering train wrecks (and I have no spoiler knowledge about that). It's been too long since the last season.