There's a reservedness about actor Vik Sahay. Chalk it up to his Canadian roots, or to the impeccable geek M.O. he cultivated in "Chuck," the highly successful NBC series which ran from September 2007 until this past January. Sahay's studiousness is like that of a theatre actor's, and yet he's perfectly at home doing movie and TV work. With a role in Universal’s "American Reunion," a leading part in William Brent Bell’s "WER"