Though originally supposed to appear as Bond's lover in the first six Bond films, Sylvia Trench (Eunice Gayson) appears only in the beginning of Dr. No and From Russia With Love.
The underground escape sequence was filmed with over 200 live rats, some of which escaped and ran amok on the streets of Madrid.
The helicopter sequence was filmed in Scotland and Sean Connery dodged a real helicopter.
Unknown to cast and crew, Pedro Armendariz (Ali Karim Bey) was dying of cancer. When his conditions was revealed, he nonetheless finished his scenes and a party was thrown in his honor. Days later, in the hospital, he committed suicide.
In both the British and American trailers, the name of every major cast member is mentioned, except one: Sean Connery.
One of the fighting gypsy girls, Martine Beswick, was identified as "Martin Beswick" in the main title sequence. It also happens that Martine Beswick is an ex-Miss Jamaica.
Principal photography for the film ended 2 days before a revolution in Istanbul.
This is Sean Connery's favorite Bond film.
Ian Fleming makes a cameo appearance-right after the train moves away and you see a man standing by a car.
Blofeld was played by Anthony Dawson (Dent in Dr. No) and his voice was dubbed by Eric Phollman
When Pedro Armendariz was too weak with cancer, director Terrance Young filled in for him
