David Edelstein

Many fans will be disappointed that Sacha Baron Cohen's The Dictator is a more or less conventional comedy and not an ambush-interview mockumentary in the style of Borat and Bruno. But that guerrilla-clown shtick would be tough to sustain: Why not let him try something else? The good news is that The Dictator is loose and slap-happy and full of sharp political barbs and has funny actors moving in and out — and at a lickety-split 83 minutes, it doesn't wear out its welcome.

Two score and four years ago, I'd fly home from fourth grade for the 4 p.m. broadcast of Dark Shadows. In 1968, vampires and werewolves weren't mainstream — the era's horror films mostly played drive-ins — yet here on TV was a daily horror soap opera.

Two spheres merge in The Avengers: the Marvel Comics universe and the Whedonverse, fans' name for the nerdy wisecracking existentialist superhero world of writer-director Joss Whedon.

The Whedon cult is smaller but maybe more fervent, inspiring academic conferences on such subjects as free will vs. determinism in Buffy the Vampire Slayer. I find a lot of Whedon's banter self-consciously smart-alecky, but I love how he can spoof his subjects without robbing them of stature.

There are many dramas and comedies in which career trajectories take couples to different corners of the country, complicating or ending romantic relationships. There will be many more, at least until someone invents a teleportation machine. What's different about each work is how the problem gets interpreted.

Teacher movies tend to be more alike than unalike, but Monsieur Lazhar makes the familiar unusually strange. The note on which it opens is shocking, tragic: A Montreal middle school student, Simon, enters his classroom ahead of the other kids and finds his teacher hanging from a pipe, dead by her own hand.