Introduced by Johnny Morris and TERRY NUTKINS
Johnny visits the new Nocturnal House at Bristol Zoo, where there's a marvellous opportunity to see animals that only come out at night: from bushbabies to spring hares.
Back in the studio, Johnny and Terry reveal the secrets of seeing in the dark - owls with huge sensitive eyes, bats and whales using echolocation, and even an animal with 60 eyes.
And a steel band with 20 limbo dancers put two champion police horses through their paces,
Producer MIKE BEYNON BBC Bristol