| Episode credited cast: |
 | Maria Alizo | - | Herself - Production Supervisor, Cargill Salt |
| Keith Dickey | - | Himself - Production Miner, Cargill |
| Jim Foley | - | Himself - Project Manager, Cargill Salt |
| Mark Frei | - | Himself - Manager, U.S. Department of Energy |
| Alexsander Garlicki | - | Himself - Professor, Academy of Mining and Metallurgy |
| Chris Gill | - | Himself - Surface Superintendent, Cargill |
| Russ Givens | - | Himself - Senior Mine Engineer, Cargill |
| John Greuber | - | Himself - Mine General Foreman, Cargill |
| Richard L. Hanneman | - | Himself - President, Salt Institute |
| Michele Anna Jordan | - | Herself - Author, 'Salt & Pepper' |
| Patrycja Karbinska | - | Herself - Wieliczka Salt Mine Guide |
| Kip McDade | - | Himself - Bolter Operator, Cargill |
| Lynn Nichols | - | Himself - Author, 'The Rape of Europa' |
| Jamie Poyer | - | Himself - Production Miner, Cargill |
| Harlan Saperstein | - | Narrator |
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