From Bob Dearborn's The Olde Disc Jockey's Almanac...
October 31, 1963…At London's Heathrow Airport, the Beatles arrived home from a tour of Sweden to find 50,000 screaming fans waiting for them. Also at the airport was U.S. television host Ed Sullivan, who noticed the excitement. "Who are those guys?" he asked a bystander, who told him they were "England's foremost singing group." Even though he had never heard them perform, Sullivan immediately contacted their manager Brian Epstein to book the band for three appearances on his CBS show early in 1964.