The patriarch of the family is dying and James, his estranged son, appears unexpectedly. He can remember nothing about a mysterious moment that occurred in the family's potting shed when he was age 14. Family members who recall the event are unwilling to describe it to him.
| Actor | Role |
|---|---|
 Celia JohnsonMrs Califer | Mrs Califer |
 Paul ScofieldJames Califer | James Califer |
 Anna MasseySara Califer | Sara Califer |
 Maurice DenhamFather William Califer | Father William Califer |
 Allan CuthbertsonJohn Califer | John Califer |
| DDavid SwiftDr Kreuzer | Dr Kreuzer |
 Cyril LuckhamDr Baston | Dr Baston |