Searching for Vimy’s Lost Soldiers, produced by Breakthrough Entertainment in association with Corus Entertainment,is set to premiere on HISTORY on April 9. Directed by Peter Williamson and written by Norm Christie, Searching for Vimy’s Lost Soldiers is a 90-minute documentary special that follows Christie who is in search of a missing cemetery, known as CA40 in 1917, to give a proper burial for Canadian soldiers who died in the assault on Vimy Ridge, that took place during World War I.