Ralph Exon works for an international fertiliser corporation - and he's created a new strain of plant. It's a mutation which he hopes will bring relief to the famine-ridden countries of the world.

It's an innocent-looking specimen. But in that plant - known as the Exon Strain - there also lurks the Destruction Factor...

Starring Paul Copley and Rosalind Adams.

James Follett’s sci-fi thriller in six-parts.

Howard Rogers …. Paul Copley
Denise Exon …. Rosalind Adams
Max Flinders …. TP McKenna
Ralph Exon …. Clifford Rose
Balfour …. Peter Wickham
Garrard …. Rod Beacham
Ted Downes …. Bruce Beeby
Kathy Downes …. Joan Matheson
Milly …. Karen Archer
Anne …. Christine Absalom
Harriet …. Debby Cumming

Producer: David Spencer

First broadcast as two x 90 minute dramas on BBC Radio 4 in March 1978. Show less