S4 E1: Rushin' Outta Russia

S4 E2: Cocoon

S4 E3: The Smell of Sulfur

S4 E4: Spoiled Rich Kid

S4 E5: Cinematograph

S4 E6: Sweet Lies

S4 E7: Fleeing Karafuto

S4 E8: Brown Bear Man

S4 E9: Partner in Crime

S4 E10: Perfect Mother

S4 E11: Steamship

S4 E12: Discharge

S4 E13: The Vanished Kamuy