Billy Wilder’s The Private Life of Sherlock Holmes is mostly a comedy comprised of mismatched episodes, the second of which concerns a search for a secret British laboratory in Scotland and an attempt by a German spy to seduce Holmes.
The search leads Holmes, Watson, and Gabrielle Valldon (the spy as yet unmasked) to Loch Ness, where the something they are looking for is a submarine base.
For comedic reasons, only Wilder and his screenwriter, I.A.L. Diamond, know that Holmes and Valldon ride a tandem, and Watson rides alone. Along the way, they stop for a picnic lunch. It’s a pleasant moment, though Watson is angry and frustrated by their lack of success. Holmes is his usual distant self. Vallone is withdrawn and waiting to learn more about what they are looking for.
Watson: We have so far investigated eight drafty castles — had our bicycles attacked by sheep and our ears assaulted by bagpipes –, and we are exactly where we started.
Holmes: (to Gabrielle) Would you like some cranberry sauce, dear?
Gabrielle: Yes, dear. (with sarcasm
Watson: Yes, dear. (with sarcasm)
See Billy Wilder. The Private Life of Sherlock Holmes (1970). Screenplay is by Billy Wilder and I.A.L. Diamond is very loosely based on Arthur Conan Doyle’s Sherlock Holmes