Jeremy was playing close to a perfect game until he played that idol for Fishbach. Then he exposed everything. Spencer knows he wasn't in that final three plan. And now that Stephen is gone, Tasha will likely try to jump overboard to protect herself.
But holy shit. The people who go over the next 2 - 3 episodes, until Joe loses immunity again, are going to feel so stupid. Particularly if it's Spencer and co.
Spencer is in the best position right now. He's got the trust of a solid group. He's got Joe and Jeremy as bigger threats and shields. If he plays this right, the game is his. If he doesn't play it right, the game belongs to Jeremy, if Jeremy can get his game back on track, or Kelley if she plays her idol properly.
Fantastic episode, though.
I would seriously consider taking that bet. Because I think Spencer's move tonight may have just won him or Wentworth the game.