"The Return of the Giant Hogweed" warns of the spread of the toxic plant Heracleum mantegazzianum after it was "captured" in Russia and brought to England by a Victorian explorer. Though the real plant is extremely toxic and dangerous, the song's lyrics are a humorous exaggeration, suggesting the plant is attempting to take over the human race. Both "The Musical Box" and "The Return of the Giant Hogweed" feature Hackett's first use of guitar tapping, a technique whereby the index finger of the plucking hand is applied directly to the guitar fret board. The opening to the latter features Hackett and Banks playing triplets in harmony.
