NOVA goes behind the scenes at the Jet Propulsion Laboratory to offer a look at the construction and launch of two Martian exploratory rovers: "Spirit" and "Opportunity".
| Actor | Role |
|---|---|
 Neil RossNarrator | Narrator |
 Steve SquyresSelf | Self |
| JJim ColvinSelf | Self |
| MMark AdlerSelf | Self |
| GGentry LeeSelf | Self |
| AArt ThompsonSelf | Self |
| JJames NewellSelf | Self |
| HHo-Jin HuangSelf | Self |
| GGeorge H. DillerSelf | Self |
| EEd WeilerSelf | Self |
| DDan McCleeseSelf | Self |
| JJuan R. CruzSelf | Self |
| JJoel KrajewskiSelf | Self |
| WWayne LeeSelf | Self |
| DDaniel LimonadiSelf | Self |
| RRandy LindemannSelf | Self |
| RRob ManningSelf | Self |
| GGreg MiehallSelf | Self |
| TTom RivelliniSelf | Self |
| SSteve SilvermanSelf | Self |
| AAdam SteltznerSelf | Self |
| PPete TheisingerSelf | Self |