Single disc edition. Digitally remastered 50th Anniversary edition of The Moody Blues third album. Originally released in 1968, this was the second Moody Blues album to feature Justin Hayward and John Lodge. In Search of the Lost Chord is a concept album around a broad theme of quest and discovery, including world exploration ("Dr. Livingstone, I Presume"), music and philosophy through the ages ("House of Four Doors"), lost love ("The Actor"), spiritual development ("Voices in the Sky"), knowledge in a changing world ("Ride My See-Saw"), higher consciousness ("Legend of a Mind"), imagination ("The Best Way to Travel"), and space exploration ("Departure"). Space exploration would go on to become the theme of the Moodies' 1969 album To Our Children's Children's Children, inspired by and dedicated to the Apollo 11 mission. The mysterious "lost chord" of the title is revealed to be the mantra "Om" (in the last stanza of Graeme Edge's poem "The Word").