Brook & Brian help Marc investigate four big claims; a disappearing ink that lets paper be reused; a remote control steering system for a jet ski; a UV air filter for toilets; an alarm clock that uses directional light and sound to wake you up.

Brook and Brian help Marc vet four new products: a ratchet tool that gives you 5x the power with 5x the speed, an efficient portable solar cooker, the safest boat in the world and an archery training system that works without firing an arrow.