You have questions. I have some answers. Q: Is Dylan McDermott going to be on “Law & Order” and “FBI”? A: This answer begins with the announcement recently that Julian McMahon, who played Jess LaCroix on “FBI: Most Wanted,” has decided to leave the drama, reportedly for “additional creative pursuits.” That led the show to hire McDermott, recently seen as the villainous Richard Wheatley on “Law & Order: Organize Crime.” (The “FBI” programs and “Law & Order” shows all come from the same producer, Dick Wolf.) As Variety noted, McDermott’s “L&O” storyline has been coming to an end, freeing him up …