LEAD into Anzac Day later this week with Compass: A Story of the Salvos ( Sunday, 9.25pm, ABC), a poignant tale of music, faith and heroism focused on the Brunswick Salvation Army Band, a section of the 2/ 22nd Battalion of the Australian army. The musicians, who doubled as medical aides, were tragically involved in World War II in the remote Pacific outpost of Rabaul. Their families waited more than 31/ years to learn of the band members’ fate. Part two of Margot ( Sunday, 10pm, ABC) follows ballerina Margot Fonteyn’s marriage to Roberto ( Tito) Arias in 1955, a well- known womaniser and parttime revolutionary. Her involvement with the roguish Tito found her imprisoned in Panama in 1959, charged with gun smuggling. The Fog of War ( Tuesday, 10pm, SBS), Errol Morris’s brilliant 2003 doco, returns, and his creatively lateral approach to difficult material is as risky as ever. In the program, condensed from hours of archival footage based on his interviews with former US secretary of defence Robert S. McNamara, Morris broadens his discussion of the politics of war to include large philosophical conundrums. Gallipoli Submarine ( Thursday, 8.30pm, ABC) is the story of the AE2, the World War I sub that was lost in the Dardanelles for more than 90 years. This classy film uses dramatic re- enactment, archival footage, underwater photography and state- ofthe- art computer- generated imagery.