The Olympics isn't just a celebration of sports ability that transcends national differences, of the indomitable human spirit, or of individual achievement. Sure, it's a tribute to all of those things, but it's also a really big reality show, featuring hundreds of characters and hard-to-follow plot lines. There are countries you've forgotten about and sports you've never seen. And then there are the good guys: the members of Team USA.
Here is a guide to this year's protagonists, who have new faces, but are taking on old roles – roles previously filled by the sort of successful athletes who end up getting lucrative sandwich-endorsement deals. The show goes on.