Battle Castle is an action documentary television series co-produced by Parallax Film Productions Inc. with London-based Ballista Media Inc. It checks out the medieval arms race shown in castle construction in the Middle Ages and, utilizing location filming, re-enactments and CGI reconstruction, tells the stories of 6 castles tested by siege. Held by Dan Snow, the collection has broadcast on History Tv, SBS Australia as well as most recently, Exploration UK.