Season One of Justified starts out as a "fugitive of the week" show while carefully fleshing out the other characters, and slowly world building the setting of Harlan County. However, there's an episode in S1 "Hatless" where the main protagonist Raylan Givens loses his trademark hat in a bar fight. "Can you keep it down? I didn't order assholes with my whiskey" and he then spends the rest of the episode trying to get his hat back, and that's when the series "clicked" for me.
"Hey Mister, that's a 10 gallon hat on a 20 gallon head."