The break between last season's finale and this season's opener has been put to good use by the writers. If you were wondering where they could take the multiple timelines, fear not. This is top-class TV, ripping the rug from under your feet and catching you with a reassuring wink. You've seen enough of this show to expect warmth, embarrassment, humour, confrontation, fear, danger and love. We're back on the windy track.