 ShortSummary = Dropped into a high-altitude jungle in the Sierra Nevada de Santa Marta mountain range near Minca, Colombia, EMT Tommy Brown and Army Reservist Leah Olszewski face territorial pumas, howler monkeys and venomous fer-de-lance snakes, but the biggest threat may be the extreme temperature changes with highs of up 100 Farad and lows plummeting down into the 40s (°F).