6x02: Fire and Freezing
6x04: Fight or Flight
6x03: Flotsam and Jetsam
5x08: Eyes and Ears
5x09: Entertainment
5x06: Everything Etc
5x04: Exploration
5x01: Engineering
5x02: Electricity
4x12: Domesticity
4x11: Deprivation
4x10: Divination
4x07: Differences