“Hero” is a revered term that, regrettably, is often overused, one that should be reserved for those truly deserving of the recognition. What’s more, somewhat surprisingly, it’s a label that is frequently most applicable to those who may not seem like the larger-than-life figures to whom it’s most usually accorded. But, in the case of actor and activist Christopher Reeve (1952-2004), “hero” is an attribute most definitely warranted. Having burst onto the scene in the lead role of “Superman” (1978), he embodied the very notion of movie superhero, a character whose uplifting impact was definitel...