During a Caribbean holiday, a British civil servant finds herself falling in love with a Russian agent.
| Actor | Role |
|---|---|
 Julie AndrewsJudith Farrow | Judith Farrow |
 Omar SharifFeodor Sverdlov | Feodor Sverdlov |
 Anthony QuayleJack Loder | Jack Loder |
 Dan O'HerlihyFergus Stephenson | Fergus Stephenson |
 Sylvia SymsMargaret Stephenson | Margaret Stephenson |
 Oskar HomolkaGeneral Golitsyn | General Golitsyn |
 Bryan MarshallGeorge MacLeod | George MacLeod |
| DDavid BaronRichard Paterson | Richard Paterson |
 Celia BannermanRachel Paterson | Rachel Paterson |
 Roger DannColonel Moreau | Colonel Moreau |
 Sharon DuceSandy Mitchell | Sandy Mitchell |
 George MikellMajor Stukalov | Major Stukalov |
 Kate O'MaraAnna Skriabina | Anna Skriabina |
 Constantine GregoryDimitri Memenov | Dimitri Memenov |
 John Sullivan1st KGB Agent | 1st KGB Agent |
| TTerence Plummer2nd KGB Agent | 2nd KGB Agent |
| LLeslie Crawford3rd KGB Agent | 3rd KGB Agent |
 Alexei JawdokimovIgor Kalinin | Igor Kalinin |
 Janet HenfreyEmbassy Section Head | Embassy Section Head |