Summary Eight weeks into the program, 25 cubes remain. Peter is surprised - and impressed; he had thought more would quit. The Cubes are excited to get some gear - now they look like a team. Peter puts them through a trial weight-cut to drop as many pounds as possible in a day. For over 24 hours they don't eat, don't drink. Dressed in plastic bags and winter clothes, they work out, then sweat it out in the sauna. It is the worst mental and physical stress of the program. Boyd calls it the worst experience of his life. For many, it emphasizes the mental challenge of MMA. Rick skips the weight cut to party - and his lone-wolf approach does not jive with the team. The weight-cut is a turning point for the Cubes, who realize just how tough it is going to be, and not just on their bodies. Boyd realizes the strain on his family, too. The toll on their personal lives is beginning to show.

• Documentary