Seasons two through five featured a promotional teaser trailer prior to the premiere of that season. The songs featured in each season's trailer were "Heaven" by Lamb for season two; "A Rush of Blood to the Head" by Coldplay for season three; "Feeling Good" by Nina Simone for season four; and "Breathe Me" by Sia Furler for season five, which is also used for montage in the series finale. All these songs are included in either of two soundtracks for the show.