Battle Castle looks to be a documentary series, hosted by Dan, that will be on Canadian TV sometime next year.
From the website:
Battle Castle brings to life mighty medieval fortifications and the epic sieges they resist: clashes that defy the limits of military technology, turn empires to dust, and transform mortals into legends.
Link roundup:
Website: http://www.battlecastle.tv
Twitter: http://www.twitter.com/battlecastle
Flickr: http://www.flickr.com/photos/battlecastle/
Wreckamovie: http://www.wreckamovie.com/battlecastle
Youtube: http://www.youtube.com/user/battlecastle
Facebook: http://www.facebook.com/battlecastle