When the title "Frasier" and the usual silhouette of Seattle are on screen, animated, ever-increasing rings radiate from the highest point of the Space Needle (presumably representing radio transmissions).
At the end Niles, Daphne and the plumber chase each other as Benny Hill used to end (but no Yakety Sax just the normal Tossed Salad song). Jane Leeves used to be one of Hill's Angels from his ITV (UK) show.