| Cast list | | Eileen Atkins | as | Helen Marriner | | Elizabeth Baker | as | Party Hostess | | Daniel Barbato | as | Young Boy | | Lynda Bellingham | as | Mary Morris | | James Frank Benson | as | Pressman | | Bruce Boa | as | Channel President | | Dirk Bogarde | as | James Marriner | | Helena Bonham Carter | as | Jo Marriner | | Richard Cubison | as | Derek Miles | | Alan Curtis | as | Lord Mallory | | Philip Goldacre | as | Richard Jenkins | | Linda Jesticoe | as | Drama Producer | | Martin Jones | as | News Editor | | Michael Lees | as | John Harvey | | David Lyon | as | Richard Beck | | Paul Maxwell | as | Bill Freed | | Lisabeth Miles | as | Margaret Bunn | | Bruce Montague | as | Geoffrey Gilman | | Philip O'Brien | as | Charlie Parrott | | Steve Parry | as | Personnel Officer | | Tony Phillips | as | First Agent | | Lee Remick | as | Grace Gardner | | Josh Richards | as | Pressman | | Alan Rowlands | as | Carson | | Frank Rozelaar-Green | as | Second Agent | | Hugh Thomas | as | Studio Director | | Alan Worth | as | Limo Driver |
| | Crew list: | | Norman Stone (Director) | | William Nicholson (Writer) |
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