Here's a weekly review of the vehicles manufacturers don't want you to see.

Things move pretty fast in the secret world of automotive development. Manufacturers are constantly testing prototypes in real-world environments, sometimes years before the debut of a new model. Meanwhile, spy photographers all around the world do their best to catch these machines so we may have a glimpse of what’s to come.

We're kept busy posting the latest information on a daily basis, but in case you missed something along the way, here’s a quick summary of all the latest SUVs, sedans, trucks, hatchbacks, and supercars we saw out and about this week.

Don't miss the latest automotive teasers: