Mad Men has the ability to trust in itself and take time to develop storylines - wasn't there (in Series 1?) a flashback to Don's war service when he changed ID's with a dead soldier?
... and as for Sal's new storyline - that dinner-party scene in the flat just oozed repressed sexuality from Sal (and, sign of the times, Ken's absolute naivet
... and as for Sal's new storyline - that dinner-party scene in the flat just oozed repressed sexuality from Sal (and, sign of the times, Ken's absolute naivet