- Foe Yay: Inspector Neele and Mary Dove in "A Pocketful of Rye".
- Moral Event Horizon:
- The murder of the Girl Guide to establish an alibi for the first murder in The Body in the Library.
- The use of Gladys as a cat's paw and then her murder when she had outlived her usefulness in A Pocket Full of Rye.
The ITV series
- Hollywood Homely: "A Pocketful of Rye" had the supposedly-plain Elaine Fortescue played by the decidedly beautiful Hattie Morahan, looking her best in fashionable clothes and an elaborate hairdo. Despite this, the other characters were at pains to point out how unattractive she was.