 Charlie HunnamPercival Fawcett | Percival Fawcett |
 Robert PattinsonHenry Costin | Henry Costin |
 Sienna MillerNina Fawcett | Nina Fawcett |
 Tom HollandJack Fawcett | Jack Fawcett |
 Angus MacfadyenJames Murray | James Murray |
 Edward AshleyArthur Manley | Arthur Manley |
 Clive FrancisSir John Scott Keltie | Sir John Scott Keltie |
 Ian McDiarmidSir George Goldie | Sir George Goldie |
 Franco NeroBaron de Gondoriz | Baron de Gondoriz |
 Matthew SunderlandDan | Dan |
 Johann MyersWillis | Willis |
 Daniel HuttlestoneBrian Fawcett (15 Yr Old) | Brian Fawcett (15 Yr Old) |
 Harry MellingWilliam Barclay | William Barclay |
| PPedro CoelloTadjui | Tadjui |
| AAleksandar JovanovićUrquhart | Urquhart |
 Yelena SoloveyMadame Kumel | Madame Kumel |
 Bobby SmalldridgeJack Fawcett (7 Yr Old) | Jack Fawcett (7 Yr Old) |
 Tom MulheronJack Fawcett (3 Yr Old) | Jack Fawcett (3 Yr Old) |
| NNathaniel Bates FisherBrian Fawcett (7 Yr Old) | Brian Fawcett (7 Yr Old) |
 Murray MelvinLord James Bernard | Lord James Bernard |
 Michael JennBrigd-General Sidney Thornton | Brigd-General Sidney Thornton |
 Michael Ford-FitzGeraldHunt Leader | Hunt Leader |
 Frank ClemTexas Gunman | Texas Gunman |
 Bethan CoomberJoan Fawcett (7 Yr Old) | Joan Fawcett (7 Yr Old) |
 David CalderSecretary Bryce | Secretary Bryce |
 Stacy ShaneAmerican Reporter | American Reporter |
 Pat MooneyRandom Scientist 3 | Random Scientist 3 |
 Colin CarnegieRandom Scientist 2 | Random Scientist 2 |
 Anthony BoyleTrench Runner | Trench Runner |
| NNeil BromleyReporter 3 | Reporter 3 |
