"Frasier" is focused around the titular psychiatrist, but it works so well thanks to the supporting cast, from David Hyde Pierce's Niles to Peri Gilpin's Roz. One regular scene-stealer on the series was Eddie, Martin Crane's pet Jack Russell Terrier. Eddie was an exceptionally intelligent dog, who was known for regularly irritating Grammer's (whose favorite episode is "Our Father Who's Art Ain't Heaven") Frasier by just quietly staring at him for long periods.

Source: Screen Rant