SEASON PREMIERE: Series creators Mark and Jay Duplass are back with another season of this wide-ranging anthology series, whose common thread is a particular room in a particular, somewhat seedy motel. Except for flashbacks, everything takes place in that titular Room 104, and each time an episode (or the door) opens, you never know quite what you’re about to witness. Which is a large part of the fun here. Two new episodes are shown each Friday by HBO, starting tonight.