Walt Disney Studios has released a new special look trailer for Mary Poppins Returns which gives us a peek at the music and m. Source. Admiral Boom and Mr. Binnacle are two characters from the film, Mary Poppins.They are neighbors to the Banks family and are retired Navy men. Background. As Bert’s introduction states, Admiral Boom and Mr. Binnacle were once members of England’s navy. Sam Smith Best Singer Tears…