The 100 - Season Two (early Jan E4)
I watched the first season out of curiosity initially sceptical about whether this would amount to more than a Lord of the Flies meets Mad Max but it soon was clear this was pretty good and I ended up hooked. Season Two sees the Ark smashed, part of it back on Earth where the survivors face difficulties but are still not aware of the terrors that Earth has waiting for them. The first to come from the Ark, mostly teenagers condemned criminals, have fought of their first major engagement with the Grounders, Earth's savage post apocalyptic warriors. However a much more technological threat is beginning to make its presence known.
Well worth a watch.
http://en.wikipedia.org/wiki/The_100_%28TV_series%29
Regards Neil