Well, Season 2 of “Marcella” answers the question of the moved corpse. (See: Blog of June 12.) There has been a passing reference to the Stu/Jason malfeasance but not much has come of it, though it seems a good card Marcella could have played when a child custody fight loomed. And the murdered cabbie and his brother have been forgotten. Two episodes to go — and I have a list of new questions I need answered. (If you’re interested, this season’s serial killer(s) targets children, though several adults (and one mouse) have also fallen along the way.