1x06: Unpaid Debts
1x05: Family Business
1x04: Old Friends
1x03: Fight or Flight
1x02: Identity
1x01: Pilot
1x08: Snow Maiden
1x06: Polyhedrus
1x05: Ambassadors
1x13: Being Human
1x11: The Grey Hat
1x10: Cain and Gabriel
1x09: Athens
1x08: Delta Force
1x07: Size Matters
1x06: Patient Zero
