If it's well written there is no filler.
GF and I watched the first season then went back to Billy Wilder's The Private Life of Sherlock Holmes, a film I suspect no one sees anymore. Anyway was fun to follow up similar references in two takes. Film, while deviating further on story, is closer in traits (cocaine v. nicotine patches, etc.) than TV, but current and 70s (Loch Ness Monster!) takes both fun. If you're looking for similar hunt it down.