The documentary follows the fictional scientist Dr. Howell, played by Glenn Conroy, as he travels from his London hotel room to his laboratory in New York City, and shows how each scenario affects his journey as well as those around him, with various experts providing commentary on that specific disaster as it unfolds.
The following descriptions of the program were released by the BBC: Below are the various catastrophes depicted in the order they occur in the film: All original official sources cite five different scenarios including a giant volcanic explosion, but the volcanic explosion segment has never been aired in the United States.
Possibly for time problems or the inaccurate depiction of the Western United States and Yellowstone park.
UKTV History aired the version including the supervolcano segment on 23 January 2007.
At one point when Dr. Howell drives off in a taxi at the beginning of the second segment, a front of a cinema is visible behind with "Groundhog Day now showing".