5x04: Exploration
5x02: Electricity
5x01: Engineering
4x12: Domesticity
4x11: Deprivation
4x10: Divination
4x08: Descendants
4x07: Differences
4x04: Dictionaries
4x02: Discoveries
3x12: Combustion
3x10: Cleve Crudgington
3x07: Constellations
