Britain: Blood and Steel (E09)

At its pinnacle, the British empire spanned every continent and covered one quarter of the Earth's land mass. Through the centuries, the rulers of this enormous powerhouse used extraordinary engineering feats to become an industrial and military titan, loaded with riches. Some of their many pioneering accomplishments include the world's first locomotive, a superhighway of underground sewers, the imposing and grand Westminster Palace, and the most powerful and technically advanced navy in the age of sail. Using cutting edge CGI, we'll take a look at the key leaders of the British empire – and explore the mark each left on society. (History Channel)