- Dick Madsen: Mrs Cauffield, we've just been informed that your husband has arrived in Moscow of his own free will. We consider the term ''traitor'' rather melodramatic within these walls
- [MI6]
- Dick Madsen: . In Intelligence vernacular, your husband has chosen ''a different loyalty''.
- George Quennell: I can't understand why anyone would want to live in America these days.
- Sally Tyler Cauffield: Maybe that's because you don't have a choice, George.
- Leo Cauffield: The KGB have a saying: "Any fool can commit a murder, but it takes a real artist to stage a natural death."
- Sally Tyler Cauffield: So, either he's been abducted against his will, or it boils down to whether or not I trust my husband.
- Fay Tolland: Trust and love aren't always mutually inclusive, darling.
- [first lines]
- Leo Cauffield: There's evidence of someone they call agent Virgin, maybe a convert.The main source of the leak is someone who works inside the foreign office in London and his code name is Homer.
- news broadcast: British authorities have now learned that George Quenell and Nicholas Petherbridge, the two diplomats that fled England on May 25, 1951 and later surfaced in Moscow, had been Soviet spies since their recruitment at Cambridge University. The length of their deception and the ease of their escape would indicate that the KGB has penetrated British intelligence at the very highest level.
- Dick Madsen: Forgive me for asking Mrs. Cauffield, but most of the undergraduates the KGB recruited from Cambridge were homosexual. I was wondering if Leo's *alleged* penchant for the opposite sex was... actually a front?
- Leo Cauffield: [while stroking his pet rat] They're very misunderstood creatures, rats. Second only to man's best friend. The most loyal and responsive of pets.
- Leo Cauffield: Sometimes I can't help wondering if the methodologies of the American democracy and communism aren't virtually indistinguishable.
- Andrew Darcy: Personally, I always thought communism was rather like acting. You're supposed to grow out of it, aren't you?
- CIA Agent Art Yallop: We don't need to get the truth by... voluntary means anymore. The advances in medical science made our job a whole lot easier.