What would the trailer for a scathing Scientology documentary be if it weren’t severe? HBO released the first short trailer for Going Clear, which premieres on March 29, and our very own review made the cut. Here’s the context: “[director Alex] Gibney’s a bit like a kid in an exposé-candy store here, and you can sense him trying to cram as much as he can into the film. Good for him: Going Clear is jaw-dropping.â€