4x07: Differences
4x08: Descendants
4x04: Dictionaries
4x02: Discoveries
3x12: Combustion
3x10: Cleve Crudgington
3x07: Constellations
3x05: Cat's Eyes
3x03: Common Knowledge
3x02: Cummingtonite
2x10: Bills, Bens, Buildings
2x11: B Major, B Minor, B Flat
