Photos: Prototyping for TV

The four hosts of forthcoming Discovery Channel show Prototype This!, with the 6x6 all-terrain runner they conceived of and built for one of the episodes of the show's first season. The show, which will air this fall, is based around the idea of coming up with prototypes for a wide variety of machines, robots, and other gadgets, designing them, testing them, and ultimately finding out if they work.

From the left, the hosts are Terry Sandin, Zoz Brooks, Mike North, and Joe Grand. Prototype This! will debut on October 15.