One of the smartest sitcoms I have come across, especially the first three seasons. So many layers of comedy. You really get lost in the characters and their weird quirks. And it's really one of the shows you HAVE TO BINGE otherwise it loses meaning. Packed with humour, line by line, character by character, scene by scene. Ron Howard's narration is truly an icing on the cake! Don't "chicken" out once you start S4, it pieces together towards the end.