Sir Patrick Stewart has one of those voices where, even if he read the phone book (which is what people used to use before cell phones), it would be captivating. Factor in his nostalgia-friendly pop culture characters, wonderful cadence, and classical training, and it's no surprise to find his acting and his mere presence so reassuring. So in these trying times, Stewart's return to his roots with Shakespeare has come as a welcome balm indeed. Stewart, who began his long career with award-winning performances through the Royal Shakespeare Company before heading for the final frontier and …