The film is based on the novel (of the same name) by the Chilean writer Francisco Coloane, and on the chronicles of the Romanian engineer Julius Popper, a nationalized Argentine and one of the principle actors in the genocide of the Selk'nam, one of the indigenous peoples who inhabited the Tierra del Fuego Archipelago.
| Actor | Role |
|---|---|
 Ornella MutiArmenia | Armenia |
 Tamara AcostaMennar | Mennar |
 Nelson VillagraNovak | Novak |
 Álvaro RudolphySchaefer | Schaefer |
 Nancho NovoSilveira | Silveira |
 Luis AlarcónAlexis | Alexis |
 Uxía BlancoMother Silveira | Mother Silveira |
 Jorge PerugorríaJulius Popper | Julius Popper |
 Claudio SantamariaSpiro | Spiro |
| MMateo IribarrenNot listed | Not listed |
| ÁÁngel ParraNot listed | Not listed |