For those of you in Australia who haven't caught up with this show yet, you need to! It's a brilliantly funny, but instructive look at historical technology (mainly military), with a focus (so far) on Australian inventions.
The eponymous boffin, builder and bombadier take a military invention, like the periscope rifle and recreate it from existing images, descriptions and plans where available. Historical controversies, such as effective range in this instance, are settled by this highly entertaining practical historical investigation.
Think Mythbusters with a particularly historical/military focus.
Other gadgets investigated are the ancient Chinese wheelbarrow mounted, rocket-propelled spear launcher, and the time-delay Scurry rifle, which allowed the Turks to believe that the trenches were still occupied while the ANZAC forces evacuated the Gallipoli trenches.
This little ripper of a show is on ABC1 at 8:15pm Sunday nights, right after Dr.Who. Sorry to all you international followers; you'll just have to wait until it comes to a TV station near you, or someone illegally uploads the episodes on to Youtube!