Earlier in the series, we celebrated the life of Nico, the legendary silverback gorilla who sadly died at the beginning of the year. Now, a new era begins for Mark Tye and his team as today they welcome two youngsters to their existing gorilla colony. But, how will these adolescent boys fair leaving their family groups for the very first time and will they be accepted by the ruling silverback Kesho and his two brothers? Navigating the introduction of these complex individuals will be the greatest challenge yet for the gorilla team. Another new arrival is ruffling feathers in the East African reserve as Haggis the ostrich gives the patrol team the run around, but could her naughty behaviour be down to a need to breed? Meanwhile Jean Johansson helps to feed one of the most deadly animals on the park an egg and finds out just how high a tiger will jump for its dinner. Also, Ben catches up with Viscountess Weymouth to find out how Newt the abandoned wallaby Joey and his surrogate mum, Gemma are doing.