As the danger mounts, Hilary is forced to hang on for rescue from the sky.

Starring Angela Pleasance.

Christopher Bidmead's spy adventure about a woman with exceptional computing skills.

Hilary …. Angela Pleasance
Beresford …. Rolf Lefebvre
Cannon …. Nigel Anthony
Jean …. Hilda Kriseman
Dr Reece …. John Pullen
Mortimer …. Dinsdale Landen
Le Noir …. Charles Hyatt
Matron …. Margaret Wolfit
Williams …. Peter Tuddenham
Dr Wormald …. Malcolm Hayes
Girl …. Jo Manning Wilson
Nurse …. Deborah Dallas
Rick …. Andrew Sachs
Michael …. Brian Hewlett
Technician …. James Thompson
Fernberg …. Kerry Francis
Policeman / Guard …. Brian Haines

Producer: John Tydeman

First broadcast on BBC Radio 4 in June 1970. Show less