The Peeks are just settling the zoo animals down for the night, except for the nocturnal animals, animals that stay awake all night and sleep during the day. Diurnal animals like lions, hippos and monkeys are awake during the day and sleep at night. When a barn owl pays an unexpected visit, his screeching is disturbing the diurnal animals, so Mr. Peek creates a cuddly owl toy to keep him company. This is the fun-filled world of Peek Zoo, where every day has new problems to solve. Each episode is a day in the life of the zookeeper Mr. Peek, his children Jimmy and Violet and a dazzling array of different and exciting animals.