Billy Geraghty, who played Walker, is credited as Jackson. William Hope, who played Jackson, is not credited at all.
Goof: The Bodleian librarian refers to the library as having had its first murder for 500 years, but in actual fact the library, established in 1602, is only just over 400 years old.
(Lewis and Hathaway have retreated from the loud party to Dr Hobson's back garden.)
Hathaway: I suppose what I'm really thinking is, what time can I decently get up and leave?
Lewis: We could invent an emergency call.
(A siren wailing in the distance grows louder.)
Lewis: Maybe there is a god.
Hathaway: If I was sure about that, I wouldn't have joined the police force.
(Nell is a student who makes money from gullible tourists whom she takes on walking tours of Oxford which she livens up with preposterous, invented "facts")
Nell: Now we're going to go down to the crocodile-infested river.
American Tourist: Suppose I say to you I don't believe a word of any of this stuff?
Nell: And I would say to you, Sir: "do you believe that all men and women are created equally with certain inalienable rights such as life, liberty and the pursuit of happiness"?
American Tourist: "I hold those to be self-evident truths".
Nell: It's easier to believe in a crocodile swimming in the Cherwell!
Hathaway: You realise what we've got, don't you, sir?
Hathaway: The Body in the Library.
Lewis: Now that is definitely facetious.
(While at Dr Hobson's party, a neighbour reported an intruder so Lewis and Hathaway left the party to investigate. Now the neighbour has complained that they were drunk and facetious to him. Innocent rebukes them)
Lewis: We promise not to do it again.
Innocent: Good. You see, the principle behind a partnership such as yours is that the junior officer matures to the level of the senior, rather than that the senior officer should regress.
Lewis: (Chastened) I'll bear it in mind.
(Innocent walks away, then turns back to them)
Innocent: Was it a good party?
Hathaway: Compared with what?
Innocent: Serves me right for asking!
Philip: We argue about what it is.
Lewis: And what is it?
Philip: Nobody really knows. That's why we argue.
Lewis: She bribed me with a postcard of a crocodile.
Lewis: [Do] you play poker?
Hathaway: No, I play chess.
Lewis: Why doesn't that surprise me?
Philip: Am I going to play at being a policeman?
Hathaway: Why not? We do it all day.
Eric Jameson: Is this good cop, bad cop?
Lewis: No. You're a very lucky lad. This is two good cops.
Hathaway: Another academic nutcase.
Lewis: You're reading my mind.
Hathaway: I know.
This episode was watched by 8 million viewers.
Philip: "I dream'd that, as I wander'd by the way, Bare Winter suddenly was changed to Spring; And gentle odours led my steps astray, Mix'd with a sound of waters murmuring."
Continuing the Percy Bysshe Shelley theme, Philip is quoting the opening lines from "The Question".
Philip: "I weep for Adonais—he is dead! I, weep for Adonais! though my tears thaw not the frost which binds so dear a head!"
Philip is slightly misquoting the opening lines to Percy Bysshe Shelley's "Adonais: An Elegy on the Death of John Keats": I weep for Adonais—he is dead!
O, weep for Adonais! though our tears
Thaw not the frost which binds so dear a head!
The lines Philip quotes later in the episode as he looks at a drawing of Nell also come from this work.
Nell: "Soon these burning miseries will be extinct. I shall ascend my funeral pyre triumphantly, and exult in the act, agony of the torturing flames. The light of that conflagration will fade away. My ashes will be swept into the sea by the winds—"
Coupland: For God's sake, is there much more of this?
Nell is reading from Mary Shelley's Frankenstein. At the point where she's interrupted with the query of how much more there is before the end, there are only two sentences left to the book.
Philip [ to Nell ]: "And the sunlight clasps the earth, and the moonbeams kiss the sea— What are all these kissings worth, if thou kiss not me?"
Philip is quoting the final lines of Percy Bysshe Shelley's poem, "Love's Philosophy".