Doomwatch

John Paul

Dr Spencer Quist

Simon Oates

Dr. John Ridge

Vivien Sherrard

Barbara Mason

Joby Blanshard

Colin Bradley

Robert Powell

Tobias Wren

John Nolan

Geoff Hardcastle

Jean Trend

Dr. Fay Chantry

Michael Elwyn

Richard Duncan

Wendy Hall

Pat Hunnisett

John Barron

Minister

John Lee

Captain - Second Airline Crew

Talfryn Thomas

Mr. Hetherington

Elizabeth Weaver

Dr. Anne Tarrant

Robert James

Barker

Hamilton Dyce

Minister

Margaret John

Mrs. Joan Simpson

Geoffrey Palmer

Major Sims

John Savident

The Minister

John Berryman

Reporter

Robert Sansom

Dr. Hugh Preston

Sheila Raynor

Mrs. Smith

Mary Loughran

Air Hostess

Caroline Rogers

Julie

Michael Hawkins

Jim Bennett