Solo (as Applegate) is aboard the small boat awaiting the return of Brach and his henchmen. While in a below deck cabin he is shown from an internal shot putting a gun inside his belt in the small of his back. When the camera angle moves to outside the boat looking into the cabin through a window, the gun is no longer there.
Solo (as Applegate) drops a number of bills of money out of a window from inside a cabin on a small boat. He drops three individually then the rest at one time. There appeared to be 7-8 total bills originally in his hand. However, when the guards are shown chasing the bills on the ground, there appears to be 12+ on the ground and blowing in the wind.
Tenley's final words are played back. He says "I can't stop. Kill me. Green...Opal...Brach", His actual last words were "Stand back, please. Green...Opal...Brach...Green".
At approximately the 30:00 mark (2008 DVD release version) studio noises and other unintended sounds can be clearly heard during the scene where Solo wakes up after being drugged.
Chuke manages to kill two cheetahs single handed. Considering the strength and agility two deadly cheetahs would have, Chuke manages to escape with only a few superficial scratches.
Walter B. Brach, played by Carroll O'Connor, tells Napoleon Solo that he will be given a drug to render him "intractable". Intractable means stubborn and rigid, difficult to work with.