Freedom vs. Captivity

The book contrasts the freedom of animals in their natural habitats with captivity in circuses or cages, as seen when the Doctor refuses to cage the pushmi-pullyu and rescues animals from oppressive situations.

The Doctor and his animals are imprisoned in a dungeon, and Polynesia's ruse is aimed at securing their freedom.

The Doctor and his animals flee the King's pursuit to reach the safety of the Land of the Monkeys, escaping imprisonment.

The Doctor and his animals are recaptured and imprisoned, highlighting the struggle for freedom.

The Doctor and his animals are imprisoned by the King and must use cunning and magic to secure their release and escape.