*** out of **** The only thing saving "Dead Ringers" from mediocrity is its director, David Cronenberg. Here is a thriller that isn't necessarily ingenious, influential, or emotionally unforgettable; yet it's thoroughly engaging, well-acted, and visually interesting. Cronenberg has a fascination of many things, some disturbing, some acceptable to a good part of society (see his more "modern" pictures). Yet, he has remained intelligent throughout his entire career, whether … more