The scene where Findlay plays movie themes is ridiculous. "Oh, the big fish". Ugh! It's so bad that I didn't realize until several viewings that Findlay contradicted himself. Unless I'm mistaken, Findlay says that movie music works best when you don't realize that it's there. I once saw a demonstration of this in a documentary. They showed a clip of a man walking into a room and looking at a doll on the chair....Nothing. Then the exact same scene was played to horror music as the man walked in, the musical suspense built until the reveal of a creepy doll played with a crescendo musical cue to a jump scare. It was very different and showed the power of music in film.
Findlay, on the other hand plays examples of some of the most memorable music in film history. Everybody knows the Psycho and Jaws themes so it was strange to use them as examples of how music works best when we don't know it's there.
Regarding the scene where Columbo won't let Findlay drive home drunk and then runs out of gas, I guess he was just doing his usual strategy of getting as close to the suspect as he can and learning everything about them. It's like borrowing art books, asking the psychic to read the vibrations where the murder occurred, starting a new health program, feigning interest that your career may make a good movie, etc. I understood why Columbo wanted to talk to Findlay, but we didn't need a long drawn out scene. They could have put that time to better use making sense of the final clue: BECCA.