David recreates Agatha's trip to Canada where he goes stargazing, ranching and takes a train across the Rockies. He discovers why indigenous people were absent from Agatha's itinerary and explores Canadian identity in Ottawa.

David travels to Hawaii, where she holidayed in 1922. He delves into her passion for surfing and asks how travel informed her novels. He also looks at the real Hawaii, meeting beach boys, cacao farmers, hula masters and lei makers.

David goes to New Zealand where he explores woollen mills and gold mines and is guided by Maori around geothermal hot springs. He learns how travel fostered Agatha's growing independence, and why his beloved Poirot hates the sea.

In Australia, David follows the path of the writer's 1922 journey to Tasmania and Melbourne. He sees how her fame spread with the publication of The Secret Adversary, and visits the same jam factory, power station and vast homestead that she frequented a century ago.

David recreates Agatha Christie's 1922 journey to southern Africa, visiting vineyards, diamond mines, and Victoria Falls. He learns how Agatha's travels inspired her novel The Man in the Brown Suit, and confronts the complex legacy of the British imperialist Cecil Rhodes.