While never as high-minded or technically facile as the likes of Yes or ELP, Tull began incorporating complex time changes, sophisticated harmonic structures, and highly developed lyrical themes on THICK AS A BRICK, the realisation of the artistic growth begun on AQUALUNG. It is here that Tull finally bursts into full-blown prog-rock mode. While AQUALUNG was a group of discrete compositions united by a theme, THICK AS A BRICK consists of one extended piece that occupies the length of the album.

1. Thick As A Brick
2. Thick As A Brick
3. Thick As A Brick
4. Interview With Jethro Tull