The first “Knight and Day” trailer, out in December, was impressive for its unique structure — Cameron Diaz retelling the movie’s mysterious first act as the trailer’s action catches up to her in real time. Pretty cool. And the footage was fun and action-oriented enough to showcase Tom Cruise in a way we haven’t really seen before: comic action star.

Fox has just put out a new full-length trailer, and all I can say is — BAM!

This thing is hot, fast, with cool action, both stars in bathing suits, foreign locales, explosions, a minimum of silly banter… basically it looks like a very cool summer movie from 15-20 years ago but with all the toys and slickness of 2010. Did I mention Diaz in a hot red bikini?

There’s also a cool new poster that gives the film a paperback novel feel, with the stars in silhouette and a pulpy splash of paint behind them.

You have to hand it to Fox. They may have managed to create a killer marketing campaign AND make a good film.

Whoo, boy. The Fox action-comedy “Knight and Day” has a trailer. And it’s a surprisingly enjoyable experience watching Tom Cruise step back into likable human terrain.

This is how a trailer should be done. It’s electric. It introduces the characters effectively, as well as establishes their chemistry. It blows some shit up. And it hints at a plot without talking the thing to death and obliterating any chance at surprise when you finally sit down to see the thing.

Not to hammer “The Bounty Hunter” too much, but contrast this trailer with that one and note the vast difference in appeal.

Anyway, this trailer does exactly what it’s supposed to do and sets up a fun action ride to look forward to next summer.