As for the plot, it begins on an airport with June Havens (Diaz) bumping into a complete stranger.  His name is Roy Miller (Cruise).  They gaze into each other’s eyes, share some idle chit chat and then step on the same plane bound for Boston.

It will not reach its destination however.  It turns out that Roy Miller is some kind of secret agent and that the plane is filled with bad guys out to get him.  He kills them all (including the pilots) and then uses his expertise to land the plane in a field.  As you’d expect, June is freaking out.  There’s not much she can do though.  Roy’s running this show and June is along for the ride… whether she likes it or not.

So what exactly is Roy trying to do?  He has in his possession a top secret device which can create limitless energy.  It turns out there’s a lot of people who want to get their hands on it.  Over the next few days, this unlikely duo will find themselves in a ridiculous number of life-threatening situations.  There’ll be shoot outs, there’ll be car chases and there’ll be government conspiracies.  What else would you expect?

If you like your adrenalin pumping action movies then I’m sure there’s plenty here for you.  I do believe more should have been made of the premise though.  I got tired of all the gaps in the story – where characters suddenly wake up (after being drugged) and everything is fine.  Was this meant to be a joke?  If so, it was overused.

The most important part of this film though are the performances from the two lead actors – Tom Cruise and Cameron Diaz.  If you like their characters and you like their sense of humour, I can safely say that you’re going to like the movie.  I chuckled a few times but not nearly enough.  I was fine with Diaz but I thought Cruise was trying way too hard.  He’s wants to come across all suave and cool but I actually found him boring and one-dimensional.  He’s also kind of creepy.

Knight And Day runs out of ammunition (unlike its characters) well before the closing credits start to roll.