S4 E49: When The Lights Go Dark (Part 1)

S4 E50: When The Lights Go Dark (Part 2)

S4 E51: Christmas At The Lift (Part 1)

S4 E52: Christmas At The Lift (Part 2)

S5 E1: Change Agents (Part 1)

S5 E2: Change Agents (Part 2)

S5 E3: Agents Of Change (Part 1)

S5 E5: Thermometric or Thermostatic (Part 1)

S5 E6: Thermometric Or Thermostatic (Part 2)

S5 E7: Miracle On Your Street (Part 1)

S7 E31: Are You Ready? (Part 2)