Ep. 4: The fourth floor
Aired on January 1, 2009

4
Episodes
- Ep. 1 · The narrative focuses on the events occurring on the first floor
- Ep. 2 · The narrative centers on events occurring on the second floor of the building.
- Ep. 3 · The narrative focuses on the events occurring on the third floor of the building.
- Ep. 4 · The fourth floor
- Ep. 5 · The narrative focuses on events occurring on the fifth floor
- Ep. 6 · The events occurring on the sixth floor of the building are detailed in this segment.
- Ep. 8 · The narrative unfolds on the eighth floor of the building.