S4 E1: Answers Given to Questions Never Asked (2)

S4 E2: Pieces of Eight

S4 E3: Waking the Tyrant's Device

S4 E4: Double or Nothingness

S4 E5: Harper/Delete

S4 E6: Soon the Nearing Vortex (1)

S4 E7: The World Turns All Around Her (2)

S4 E8: Conduit to Destiny

S4 E9: Machinery of the Mind

S4 E10: Exalted Reason, Resplendent Daughter

S4 E11: The Torment, the Release

S4 E12: The Spider's Stratagem

S4 E13: The Warmth of an Invisible Light

S4 E14: The Others

S4 E15: Fear Burns Down to Ashes

S4 E16: Lost in a Space that Isn't There

S4 E17: Abridging the Devil's Divide

S4 E18: Trusting the Gordian Maze

S4 E19: A Symmetry of Imperfection

S4 E20: Time out of Mind

S4 E21: The Dissonant Interval (1)

S4 E22: The Dissonant Interval (2)