- Actor Allusion: Um, sort of. Tom Selleck is known for his epic mustache, which is referenced a couple of times in a quite humorous fashion.
- Dueling Movies: Killers came out around the same time as Knight and Day, which has a similar plot of an agent falling for a clueless civilian blonde girl.
- Hey, It's That Guy!:
- Not Screened for Critics
- Playing Against Type: Ashton Kutcher as an action hero.
- Almost all the assassins are played by comic actors. A couple having even featured on Saturday Night Live.