I wonder what's wrong with Ken? the way he snapped last night it's not like him, there again he does have to live with his mother in law Blanche. Maybe it's something to do with the reunion he went to, maybe the woman who he spoke to was his first love! or there again maybe it had something to do with his pal dying. Perhaps he whats to do all the things he really wanted to do before it's too late. I think there is going to be a big story line for Ken coming up. I don't know why he has taken to wearing his jumper slung over his shoulders all of a sudden.  I hope they are not trying to make him look "cool" to prepare him for another affair!, please no.  

maybe it had something to do with his pal dying

I should say so.  Nothing like coming to terms with mortality to re-evaluate what you're doing with your life.  As for a major storyline?  I doubt it - seems to be more a case of winding down (like Rita deciding to quit the kabin).  Hope these two aren't leaving the programme.

Re Ken with his jumper slung over his shoulder

When you see Ken without the jumper slung over, he has an enormous stomach.  I think the idea is to detract attention away from it.  While you're looking at the jumper thinking why is that daft thing on his shoulder you're not looking at the big tummy.