A Family At War

If It's Got Your Number On It (1x12)

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Freda has to work late, and on the way home meets an Australian airman, Owen Thomas, in a public air raid shelter. She goes out with Owen for a week and is discovered with him one night by her childhood boyfriend, Peter Collins. A fight ensues. At the end of the episode Peter is killed by a bomb. Phillip is home on embarkation leave.