Watch Gomovies. Featuring never before seen footage of the most seminal rock band in music history, BUILDING THE BEATLES is an unprecedented look at the players who have been left out of the story of The Fab Four’s meteoric rise… until now. Journey back to meet Mona Best (mother of the first Beatles drummer Pete Best), Allan Williams, and Sam Leach, each of whom played a crucial role in making The Beatles who they are. Unearthing the pieces of unseen Beatles history, this documentary is a moving testament to the people who changed history forever.