Actor Gary Miller is credited in the cast list as 'Webster' even though he plays Ballentine. The character is even referred to as Ballentine on screen.
Belker's little friend Mickey looks like a hooded rat, not a mouse.
In briefing a operation, Hunter say he plans to use the cops, "in much the same way Hannibal deployed his Nubians when taking the sea wall at Syracuse." Syracuse was an ally of Carthage, which Hannibal never had to attack.
Lieutenant Hunter calls a pistol a Walther PPK even though it is clearly a revolver.