Knight and Day is a surprisingly fun romp. Tom Cruise and Cameron Diaz make for a surprisingly good comic-action pairing on screen. The surprising aspect is based, unfairly, on the reputation Cruise has earned as someone slightly outside the bounds of mainstream. Regardless of his well-publicized television antics, he remains quite good at what he does on the big screen. In Knight and Day, Cruise plays an American spy cut from the same cloth as James Bond (he’s too funny to be Jason Bourne), but whose loyalties (and equilibrium) are not entirely clear. Chance throws Cameron Diaz at him who becomes unwittingly embroiled in Cruise’s spy caper. The plot centers around a preposterous (to the extent that it violates the fundamental laws of physics) Macguffin that Cruise is trying to save from the bad guys (unless he is a bad guy), but the movie earns its points primarily on Cruise’s charm and a script that has more witty lines than groaners.