September 1974. BBC Radio 4 broadcast an adaptation by Mollie Greenhalgh directed by Kay Patrick in 1997, with Geoffrey Banks as Professor Linden, Kathleen Helme as Isabel, Christopher Godwin as Rex Linden, Carole Hayman as Dr Jean Linden, Joanna Wake as Marion de Saint Vaury, Penelope Reynolds as Dinah Linden and David Mahlowe as Alfred Lockhart. It was re-broadcast in 2017 on BBC Radio 4 Extra. References 1947 plays Plays by J. B. Priestley West End plays