Awesome Moments: Out-of-retirement Sir James wins a game of catch with stone cannonballs against a group of much bigger Highlanders.
Awesome Music: Burt Bacharach's bouncy theme is a marvelous piece of '60s kitsch, and is probably better known than the film itself.
Played by Herb Alpert and the Tijuana Brass, everyone!
Ironically, this is the only Bond movie to date (canon or no) to have spawned two hit singles, as both the instrumental theme music and Dusty Springfield's Breakaway Pop Hit "The Look Of Love" charted.
Big-Lipped Alligator Moment: Vesper Lynd appears to be disposing of a body when Evelyn comes to her house. This is never mentioned or referred to again.
The UFO. Just... what?
Bizarro Episode: If there was but one film that could be called a Big Lipped Alligator Movie, this is it.
Ending Fatigue: Arguably starts when Evelyn Tremble and Le Chiffre are killed. The remainder of the film has to bring all the other characters together to unmask and confront the Big Bad. The resultant climax degenerates into a gigantic free-for-all fight in the casino with a Kill Em All ending played for LAUGHS, followed by a Fluffy Cloud Heaven ending.
It's mentioned in the film that there have already been multiple new James Bond 007s after the original since none had the original's survival skills. It was already quite clear that Sean Connery would not play James Bond 007 anymore after the same year's You Only Live Twice, but nobody could have known the main series would go through five Bond actors altogether (it's on its sixth with Daniel Craig, who started with the official and much better received classic Casino Royale in 2006.
Mis-blamed: Despite EON having nothing to do with this version of Casino Royale, the film's critical failure and early release led to Fan Dumb savaging THEM for its poor quality. This permanently turned Albert Broccoli and his daughter off of anything Bond related that wasn't under their control, which became their rallying motive for the long and messy legal battle with McClory that only started ebbing when he died in 2006 and ended with his estate giving the last remnants of Bond to them in 2013, almost 50 years after this movie's release.
Took the Bad Film Seriously: Peter Sellers, because he was cast when it wasn't going to be a spoof. His performance is funny in a mostly-deadpan way, but he's not on the same wavelength as most of the rest of the cast. This is also one of the few places where you can hear his natural speaking voice.