I imagine Alfred was in British intelligence in WWII. He came to the US after the war to visit his old friend, Thomas Wayne, and found himself taking care of a young Bruce Wayne when Thomas was murdered. Having worked sort of as a "Q" for the Allies, he uses his skills to help Bruce become Batman.
I love this series. It's so original and detailed and well-drawn and awesome. /fangirls all over the place Just really great job. Really.
SPACCHI TUTTO!