(CNN)There are a fewer surprises successful "The Beatles: Get Back."
One that grabbed Stephen Colbert was however pianist Billy Preston came to beryllium known arsenic "the 5th Beatle."
During an interrogation connected his precocious show that aired connected Thanksgiving, Colbert talked with Peter Jackson, who directed the recently released Beatles docuseries.
They discussed however Preston came to hop connected the keys with the iconic band, made up of John Lennon, Paul McCartney, George Harrison and Ringo star.
"He wasn't adjacent expected to beryllium connected the album," Colbert said. "He was conscionable a person of George's who stopped by."
"The album" is 1970's "Let It Be." The caller docuseries builds connected audio and movie from the 1970 "Let It Be" documentary.
"The Beatles: Get Back" explores Harrison quitting the set and McCartney assuming much of a enactment relation arsenic John Lennon focused connected his matrimony and enactment with Yoko Ono.
Jackson talked to the Washington Post about moving connected the project.
"I tried to marque a precise honorable movie," helium said.
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