Flight of the Conchords - Season 2 Episode 1 A Good Opportunity Born to folk!
Overview: Bret and Jemaine fire Murray for neglecting them in favour of the Crazy Dogggz and almost immediately they receive an offer to write a jingle for a commercial. Meanwhile Murray's fortunes reverse after he discovers that the Crazy Dogggz big hit is a rip-off of a 1990s Polish song.