Short answers, pulled from the story.
"I'm Only Sleeping" was recorded for Revolver, the Beatles' 1966 studio album, released on the 5th of August 1966. In the United States and Canada, Capitol Records placed it on Yesterday and Today instead, released two months earlier on the 20th of June 1966. Since the 1987 CD standardisation, the song has appeared on Revolver in North America.
"I'm Only Sleeping" is credited as a Lennon-McCartney composition and was written primarily by John Lennon. The first draft of Lennon's lyrics was written on the back of a letter from 1966.
George Harrison played the backwards lead guitar parts by performing with the tape running backwards, so when reversed the notes would fit the song's dreamlike mood. One guitar was recorded with fuzz effects, the other without. This was the first use of such a technique on a pop recording.
Harrison spent approximately five hours in a late-night recording session at EMI Studios on the 5th of May 1966 writing and recording the double backwards guitar part. Engineer Geoff Emerick described the process as "interminable" and recalled Harrison hunched over his guitar for hours on end in deep concentration.
The official music video for "I'm Only Sleeping", directed by Em Cooper and released on the 1st of November 2022, won the Grammy Award for Best Music Video at the 66th Annual Grammy Awards in 2024. The video incorporates an animation of around 1,300 oil paintings by Cooper.
Madness singer Suggs released a cover in July 1995, produced by Sly and Robbie, as the lead single from his debut solo album The Lone Ranger; it reached number 7 on the UK Singles Chart. Rosanne Cash included a cover on her 1995 album Retrospective, and Jeff Tweedy released a cover in February 2014.