The Beatles

The Beatles were a music group from Liverpool during the 1960s and 1970s.

In 1965, the Beatles performed "Ticket to Ride" at Riverside Studios. The Doctor, Barbara Wright, Ian Chesterton and Vicki observed the performance on the Time-Space Visualiser. (DW: The Chase)

In 1969, Ace prevented Huitzilin from killing the Beatles on the roof of the Apple building. (NA: The Left-Handed Hummingbird)

In 1970, Paul left the Beatles. They acquired two new members, Billy and Klaus. (PDA: The Devil Goblins from Neptune)

Although not explicitly identified as such, these were presumably Billy Preston and Klaus Voormann.

In 1985, Fitz Kreiner saw the Beatles perform at Live Aid in an alternate timeline. Fitz collected alternate timeline Beatles records during his travels. (EDA: The Gallifrey Chronicles)

In 2007, the Beatles were spotted on the roof of Abbey Road studio. (TW: End of Days)

By the 25th century, the Beatles' songs were considered classical music. (DW: The Chase)