No it happened last week. All four come back, they nominate one player to go head to head with the chaser, and the prize (shared) is a flat amount, with no relation at all to what they achieved in the previous bits.
It's all coming back to me now (there's a song there somewhere!!).
I knew they all had the chance of winning £1000 each - I just forgot that it was only one person up against the chaser.