Listen to I've Believed in You online. I've Believed in You is an English language song and is sung by Roger Goula. I've Believed in You, from the album Inspector George Gently Series 8: Gently Liberated & Gently and the New Age (Music from the Original TV Series), was released in the year 2017. The duration of the song is 3:49. Download English songs online from JioSaavn.