An alcoholic American scout and Rex Larson's longtime nemesis. Recruited against his will by financier Jefferson, Mark joins the expedition primarily to confront his rival and reclaim his unfaithful ex-wife, showing no interest in financial gain. He endures the grueling jungle march, survives Larson's secret purges, and ultimately leads the rebellion that defeats Larson in a fatal confrontation, ending the film romantically with Janice.
Longstanding personal rivalry fueled by past betrayal.
Romantic connection forged through shared trauma.
Shared survival experience in hostile terrain.
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