Audio problem: As Playmate of the Year Carrie Foster is brought out to the audience carried by two Green Berets watch the band behind her closely. The bass player stops playing as he scratches his head but the bass on the soundtrack keeps going.
Trivia: Harvey Keitel was originally cast as Captain Willard. Two weeks into filming, director Francis Ford Coppola felt Keitel wasn't taking the role seriously enough, so he fired him and reshot scenes with Martin Sheen as his replacement.
Question: Why was only one officer (Captain Willard) sent to assassinate Colonel Kurtz? Isn't it very unlikely for a captain like Willard to be able to kill a powerful and influential and "insane" colonel like Kurtz?