The tenth stage of the "Van Kanigem" tournament.

I have a question about the manual – I’ve looked through what I have, but I can’t find it – how do you dismiss a hero in Heroes 5? Is it possible?

It is possible. Click on the hero, and in the lower right corner of the screen, on the “radial menu,” there will be a button in the form of a crossed-out circle. But the hero to be dismissed must be outside the castle.