Saving the Sabretooth.
Early Pleistocene and Early Holocene South America, 1 million years ago and 10,000 years ago Nigel is shown walking with a tame cheetah. He comments that specialization has threatened the cheetah, and later that specialization may have wiped out the Smilodon. In the park the titanosaurs break their fence and have to be let wander around the park. They go towards the park's main gates. Bob follows one in a tractor. During this he shouts at a titanosaur "Get back, you great lummox." To his disgust it discharges runny smelly faeces in front of him: its gut clearly does not like some of the modern vegetation...