In Catching Fire, the second book/film of the Hunger Games series, there is a very special Hunger Games in which
all the tributes are victors of previous games, and several of them are conspirators in a rebel plan involving destroying the arena, and escaping to District 13 to participate in the uprising.
How many of the tributes were in on this plan? It's clear that Beetee, Finnick, and Johanna at least were part of it, and probably also Wiress and Mags, although not Katniss and Peeta. Do we ever find out exactly who the in-arena conspirators were?