Fastest animals Fastest animals This is a list of the fastest animals in the world, grouped by types of animal. The fastest land animal is the cheetah, which has a recorded speed of . The peregrine falcon is the fastest bird and the fastest member of the animal kingdom with a diving speed of . The fastest animal in the sea is the black marlin, which has a recorded speed of . While comparing between various classes of animals, a different unit is used, body length per second for organisms. The fastest organism on earth, relative to body length, is the South
The Web Planet Doctor and Vicki escape. They meet up with Barbara and the Menoptra and devise a plan to attack the Carsinome. The Doctor and Vicki return to the Carsinome, where the Zarbi take them to the Animus, a great spider-like creature, which mesmerises them. Meanwhile, Barbara and the Menoptra launch their attack on the Carsinome from outside whilst Ian and Vrestin with the Optera reach the Animus from below. They eventually defeat the Animus with a bomb. The story had the working title of "The Webbed Planet". Episode six was initially titled "Centre of Terror". The novelisation restores this title for