Health officials from the World Health Organization link a smallpox outbreak in Europe to oil drilling in the Middle East.

Terry-Thomas
as Archibald Bannister

Sonja Ziemann
as Michele Cooper

Alex Nicol
as Edward Kennedy

Richard Briers
as Jamieson

Honor Blackman
as Sister Sheila Bryan

Guy Deghy
as Nick Ivanovitch

Carol White
as Beryl

Clive Morton
as Hatfield

Geoffrey Keen
as Foster

Martin Benson
as Rahman