When it comes to plot progression, it’s best to expect baby steps from the new Twin Peaks, which was (mostly) the case with “Part 5.” Cooper is still very out of it – underlined by the closing credited, as he sadly just stood at the foot of that statue.
But there are intriguing little hints that things are changing. He’s remembered his love of coffee (hurray!), the word “agent” caught his attention, and the one and only time he seemed to be in the moment was when he called one of Dougie’s coworkers (Tom Sizemore) a liar. Was this his FBI deduction skills coming through or something more? We did see a strange green glow on Sizemore’s face right before it happened, so either is possible.