Complex sentence: When blaming Jemaine for dropping the TV out the window, Murray likens him to Keith Moon, drummer for The Who and notorious destroyer of hotel rooms, who allegedly drove a car into a swimming pool as Bret ends up doing later in the episode.
Split into simpler sentences: When blaming Jemaine for dropping the TV out the window, Murray likens him to Keith Moon, drummer for The Who and notorious destroyer of hotel rooms. There is also a famous, possibly apocryphal, tale where Moon drove a car into a swimming pool--as Bret ends up doing later in the episode.