S4 E1: Ambush

S4 E2: Something New

S4 E3: Friendly Fire

S4 E4: When the Bough Breaks

S4 E5: Good Touch, Bad Touch

S4 E6: Ground Zero

S4 E7: Fathers and Sons

S4 E8: Freak Show

S4 E9: Obstruction of Justice

S4 E10: Do You See What I See?

S4 E11: Think Warm Thoughts

S4 E12: Sharp Relief

S4 E13: Carter's Choice

S4 E14: Family Practice

S4 E15: Exodus

S4 E16: My Brother's Keeper

S4 E17: A Bloody Mess

S4 E18: Gut Reaction

S4 E19: Shades of Gray

S4 E20: Of Past Regret and Future Fear

S4 E21: Suffer the Little Children

S4 E22: A Hole in the Heart