As the field of crystallography celebrates its centenary year we look back at how it all began -- with a father and son team and a humble salt crystal. With the help of archive footage and historic objects from the Ri, Patience Thomson, daughter of William Lawrence Bragg, presents an intimate portrait of her father. From his detailed artworks to his love of detective stories and puzzles, Patience reveals how Lawrence's unique character and analytical mindset led to numerous scientific breakthroughs. Plus, find out how he reacted to receiving news of his Nobel Prize while serving on the front during WW1 at the age of 25 and discover how the Braggs applied their scientific knowledge to aid the war effort. Professor Stephen Curry is also on hand to demonstrate just how important the Braggs' discovery was and how the field of x-ray crystallography has revealed the structure of hundreds of different molecules, from enzymes and proteins to entire viruses. The Braggs' discoveries of 1913 remain at the foundation of modern day techniques and, to date, 29 Nobel Prizes have been awarded to work related to x-ray crystallography. Our thanks to Stephen Curry, Patience Thompson, and filmmaker Thom Hoffman. This film was supported by the Science and Technologies Facilities Council (STFC): http://www.stfc.ac.uk The Ri is on Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and Tumblr: http://ri-science.tumblr.com/ Our editorial policy: http://www.rigb.org/home/editorial-policy Subscribe for the latest science videos: http://bit.ly/RiNewsletter