I've seen
Mercury Men and liked it pretty well, but I don't think there's been a new episode in a while. They've had it up on On Demand.
Trenches was well made but I didn't like the first episode. Nothing but explosions, military shit, gritty film quality and washed out colors-- all stuff I have no use for. But it shows what can be done.
I will now check out
Riese. I haven't heard of that one.