<P> Sam Stewart joins the Mechanised Transport Corps at the outbreak of the war . She is seconded to the police force as a driver in the first episode to relieve staff shortages in the police force, and becomes Foyle's driver . She is enthusiastic about police work, offering unsolicited advice and help to Foyle and Milner despite Foyle's instructions not to discuss police work . They rely on her assistance more and more, primarily when she overhears bits of important conversations . In "Plan of Attack", Stewart had left the police service soon after Foyle's resignation but returns as his driver when he rejoins the force . She has a healthy appetite; her struggles with rationing are a recurring, humorous theme . She invites herself to eat with Foyle several times, and covets a turkey (kept for evidence) in "Bleak Midwinter". </P> <P> Stewart's father and several uncles are Church of England vicars . Her father, the Rev. Iain Stewart, visits her in Hastings ("Eagle Day"). Although he wants her to return home to Lyminster, he realises that her work for the police is important after discussions with Foyle and using his university training in art to help Milner solve a crime . Stewart stays with her uncle, the Rev. Aubrey Stewart, at his vicarage in Levenham in "The French Drop" and Foyle houses him for an ecumenical conference near Hastings in "Plan of Attack". In that episode, she says that all her uncles are vicars . </P> <P> She becomes friendly with Andrew Foyle and, eventually, involved romantically . They try to keep their relationship from his father, fearing his disapproval . Stewart supports Andrew when he experiences shell shock in "Enemy Fire", but their relationship ends when he sends her a "Dear Jane letter" in "Invasion". She becomes fond of American private Joe Farnetti, but refuses his marriage proposal . The relationship continued after D - Day, since she complains in "Broken Souls" that he "ran off with some French girl". Andrew returns in "All Clear", asks Stewart to forgive him and they celebrate VE day . Series six begins in June 1945, with Stewart a housekeeper for a wealthy artist; her sense of purpose is apparently gone . Later in the sixth series, Stewart has a new love interest: Adam Wainwright, a former Bletchley Park codebreaker who proposes to her in that series' final episode . By series seven they are married, and in series eight are expecting their first child . </P> <P> Squadron Leader Andrew Foyle DFC, RAF is Christopher Foyle's only child . At the outbreak of the war he was a student, and joined the RAF in "The German Woman". Undergoing training as a fighter pilot in Scotland, He is posted to the south coast and is involved in radar trials ("Eagle Day"). He sees action in the Battle of Britain . In "Enemy Fire", experiencing combat fatigue stemming from near - constant flying and grief at the loss of many friends, he briefly goes AWOL . His superior, Wing Commander Turner (Martin Turner), is understanding and transfers him to a training unit . </P>

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