The final part of Stewart McPherson's journey to visit all of the UK's Overseas Territories takes him to islands united by being military or trading bases.

Stewart McPherson progresses on to the island of Tristan da Cunha, then visits the Falkland Islands, South Georgia and Antarctica.

Naturalist Stewart McPherson explores the British Overseas Territories. He begins in Bermuda, travelling on to the British Indian Ocean Territory and Pitcairn Island.