S4 E1: One Man's Worth (1)

S4 E2: One Man's Worth (2)

S4 E3: Courage

S4 E4: Proteus (1)

S4 E5: Proteus (2)

S4 E6: Sanctuary (1)

S4 E7: Sanctuary (2)

S4 E8: Beyond Good and Evil (1)

S4 E9: Beyond Good and Evil (2)

S4 E10: Beyond Good and Evil (3)

S4 E11: Beyond Good and Evil (4)

S4 E12: Have Yourself a Morlock Little X-Mas

S4 E13: The Lotus and the Steel

S4 E14: Love in Vain

S4 E15: Secrets, Not Long Buried

S4 E16: Xavier Remembers

S4 E17: Family Ties