June Havens (Cameron Diaz) is just trying to get back to her family so she can go to her sister's wedding. Too bad she keeps running into little setbacks like several "accidental" bumps into Roy Miller (Cruise), a smooth talking secret agent, and not to mention a plane crash after Roy kills all the people on the plane. Now that June is wondering who this crazy man is, Roy decides that they need to stick together until Roy sorts out his problem. What is the problem? Roy claims that he has a new kind of battery called the Zephyr that is capable of powering whole cities. He tells June that when the battery was first created, Agent Fitzgerald (Peter Sarsgaard) wanted to take the battery for himself and when Roy declined, Fitzgerald framed Roy. However, one day when intelligence agents pick up June, they tell her that Roy is a rogue agent that is unstable and wants to sell the battery to a Spanish gang. Taking both stories to mind, June procedes to follow Roy on his mission to clear his name and will have to find out which story is true.
What carries "Knight and Day" is the on-screen performances and chemistry of Cruise and Diaz. I wouldn't have picked a better twosome to play the roles. The way both of them deliver their comedic lines is great. Cruise pours both charm and comedy into his character which looks to be a crazy secret agent who doesn't seem to be afraid of any risks and dangerous situations. On the opposite side is Diaz whose character matches Cruise's character with a bit of wackiness of her own. Both performances help give the film a good comedic twist.
Unfortunately, "Knight and Day" is bound by the fact that it is pure formula. This is definitely not the first time we have seen the story of a secret agent trying to clear his name. In fact, one of the well known examples of when that kind of premise was considered more original (at least in my memory) was another Tom Cruise film, "Mission Impossible." Yes, because of this the film fails to be original and is too predictable.
To be honest, I can't really find that much to say about "Knight and Day" because after looking at the unoriginal plot and common laughs, the film isn't that complex. In all it's just a simple popcorn film. The best way to describe "Knight and Day"? An accurate description is an unoriginal romantic comedy with entertaining chase sequences and good acting from its leads. Besides that, nothing really sticks out as being unique and the film takes its place with many other summer popcorn films of its kind. I give it two stars out of four.
"Knight and Day" has a running time of 110 minutes and is rated PG-13 for sequences of action violence throughout, and brief strong language.