The Beatles first became interested in Transcendental Meditation when they attended the Maharishi's lecture at the London Hilton, Park Lane, on 24 August, 1967 on the suggestion of Pattie Boyd, George Harrison's then wife. Two days later, on 26 August, the band boarded a train for Bangor, Wales to attend a 10-day retreat with the Maharishi but the trip was cut short when Brian Epstein died the following day. The Beatles then made plans to attend the Maharishi's center in India in late October but commitments relating to the Magical Mystery Tour filming made them postpone the trip to the following year. When Lennon appeared on David Frost's programme in Autumn 1967, he discussed his involvement in meditation and according to Cynthia Lennon, at that time was evangelical in his enthusiasm for Maharishi, as this letter testifies. When the Beatles eventually made it to Rishikesh, India in February, 1968, the trip famously turned to disaster, with Lennon cutting his trip short after supposed allegations of sexual impropriety on the part of the Maharishi. Lennon became utterly disenchanted with the Maharishi and Transcendental Meditation, leading him to pen Sexy Sadie in response to his experiences.