The ninth configuration

In an experimental government center for troubled Vietnam veterans, the inmates run the asylum. One works on an adaptation of Shakespeare--for dogs. Another fancies himself a caped superhero. Still others masquerade as frogmen, nurses, nuns, pirates, doctors. Yet Colonel Vincent Kane, the psychiatrist in charge, eyes all with a stoic reserve. Maybe too stoic: there's a mystery here. And its final resolution is like a thunderclap.