Yup, certainly was a goodun. The Isles of Scilly, also known as The Islands of the Dead because of all the tombs.

Think Kammer's right, don't think the Isles of Scilly were joined to mainland Britain during the Neolithic; the computerised reconstruction of the land between the islands themselves though was interesting, 'with the tombs on the higher bits looking down on the living'. And the question as to whether the cremated remains of people were brought from the mainland or whether they were locals is a fascinating one - must watch it again when it's repeated.