Crossing the Lines (S04E17)

S04E01 A Matter of Time S04E02 What's Done in the Dark S04E03 Behind Closed Doors S04E04 Eager Little Flower S04E05 Close Call S04E06 Disappearing Act S04E07 You Have to Play the Game S04E08 Eye for an Eye S04E09 Wicked Intentions S04E10 Tonight Is the Night S04E11 State of Emergency S04E12 The Art of Secrecy S04E13 Keep Fighting S04E14 Now You See Me S04E15 Do or Die S04E16 Plan in Action S04E17 Crossing the Lines S04E18 Hot On Their Tail S04E19 The Ticking Clock S04E20 Lamb To The Slaughter S04E21 Make Or Break S04E22 Fistful of Greed