In Gaylene Preston's War Stories, her mother Tui revealed that she had fallen for another man while her husband was off at war. In Home by Christmas, inspired by an audio interview with her father Ed, Preston looks again at her parents' life during wartime. In this behind-the-scenes doco, veteran actor Tony Barry talks about the acting techniques which allowed him to "be, rather than play, Ed"; Preston reveals that Barry's distinctive voice is almost a carbon copy of her father's; and Chelsie Preston Crayford talks about portraying her own grandmother.