Purporting to be an investigation into the UK's contemporary "brain drain", Alternative 3 uncovered a plan to make the Moon and Mars habitable in the event of climate change and a terminal environmental catastrophe on Earth.

Tim Brinton
as Himself

Gregory Munroe
as Colin Benson

Carol Hazell
as Katherine White

Shane Rimmer
as Bob Grodin

Richard Marner
as Dr. Carl Gerstein

Alec Linstead
as Professor Broadbent

David Baxt
as

Norman Chancer
as

Anthony Roye
as

Patsy Trench
as