EVERY MOVIE HAS A LESSON

In her two films since "Tammy," Melissa McCarthy has done both.  Going against her bread-and-butter zaniness, playing it straight for a change in last fall's superb Bill Murray vehicle "St. Vincent" was the first step.  The new summer spoof comedy "Spy" is the next step, thanks to McCarthy returning as the go-to muse for her "Bridesmaids" writer/director Paul Feig.  With Feig and a stellar cast, "Spy" is clearly better company, but it's not a tremendous step up in material or acting for our star.  "Spy" feels like one of those movies that is funny the first time and lasts for that one dose, but won't be something you'll revisit and likely something you'll regret you really liked five or ten years down the road.  It is worth your Redbox rental, but not all that much more.