in 1967 and Psych-Out in 1968. Musicians and LSD On March 27, 1965, Beatles members John Lennon and George Harrison (and their wives) were dosed with LSD without their permission by their dentist, Dr. John Riley. John Lennon mentioned the incident in his famous 1970 Rolling Stone interview, but the name of the dentist was revealed only in 2006. On August 24, 1965, Lennon, Harrison and Ringo Starr took their second trip on LSD. Actor Peter Fonda repeatedly said "I know what it's like to be dead" to John Lennon during an LSD trip. John Lennon wrote "Lucy in the Sky with Diamonds", a fanciful song which many assumed referred to LSD, although he always denied the connection as coincidence. The songs "She Said She Said" and "Tomorrow Never Knows" from the Beatles' Revolver album explicitly reference LSD trips, and many lines of "Tomorrow Never Knows" were borrowed from Timothy Leary's book The Psychedelic Experience. Around the same time, bands such as Pink Floyd, Jefferson Airplane, and The Grateful Dead helped give birth to a genre known as "psychedelic rock" or acid rock. In 1965, The Pretty Things released an album called Get the Picture? which included a track titled "L.S.D." LSD became a headline item in early 1967, and the Beatles admitted to having been under the influence of LSD. Earlier in the year, British tabloid News of the World ran a sensational three-week series on 'drug parties' hosted by rock group The Moody Blues and attended by leading stars including Donovan, The Who's Pete Townshend and Cream drummer Ginger Baker. Largely as a result of collusion between News of the World journalists and the London Drug Squad, many pop stars including Donovan and Rolling Stones members Mick Jagger and Keith Richards were arrested for drug possession, although none of the arrests involved LSD. The FBI suggested in now declassified documents that the Grateful Dead were responsible for introducing LSD to the U.S. The Grateful Dead were the "house band" at Ken Kesey and the Merry Pranksters' Acid Tests. These free-form parties introduced many people on the West Coast to LSD for the first time, as documented in Tom Wolfe's The Electric Kool-Aid Acid Test and Phil Lesh's Searching for the Sound. Acid historian Jesse Jarnow describes how Grateful Dead concerts served as the United States' primary distribution network for LSD in the second half of the twentieth century.