S1, E2: Today's a big day for the gorillas. Their old exhibit is being torn down in preparation for a new gorilla rainforest and they have to move into a temporary home. It will be up to the keepers, Vanessa Phelan and Dianne Devison, to convince them that their new home is safe and gorillas hate change. Now that the Siberian tigers, Tonghua and Tatiana, are acquainted, it is time to make tiger babies. Today Tatiana is in heat and Tonghua is re-introduced to her.