Shaun Gilmartin has specialised in history and science programming as a TV executive producer and writer for the past two decades. It has taken him all these years to discover more about his father, who died when he was two. Cassie Gilmartin has 20 years experience writing and editing family history, including eight years as the publisher and editor of the award-winning magazine, Inside History. She is co-host and producer of the Portrait Detective podcast in collaboration with the State Library of New South Wales.