The complete fourth season of the popular medical drama. The season was originally broadcast in 1997/98 with developments including a new baby, an engagement and an emotional visit home. Maria Bello and British actress Alex Kingston joined the cast creating explosive new stories. Episodes are: 'Ambush', 'Something New', 'Friendly Fire', 'When the Bough Breaks', 'Good Touch', 'Bad Touch', 'Ground Zero', 'Fathers and Sons', 'Freak Show', 'Obstruction of Justice', 'Do You See What I See?', 'Think Warm Thoughts', 'Sharp Relief', 'Carter's Choice', 'Family Practice', 'Exodus', 'My Brother's Keeper', 'A Bloody Mess', 'Gut Reaction', 'Shades of Gray', 'Of Past Regret and Future Fear', 'Suffer the Little Children' and 'A Hole in the Heart'.