Turns out there were only three episodes I missed from last season. I thought it was more.
Jeff meets his Dad: Possibly the best episode of the season as it tapped into some of the emotional baggage of the series.
Physical education education: This is like an average first season episode, they pulled it off.
Evil twins: This one didn't work. I like the idea but it didn't tap into the things that the darkest timeline tapped into. A lot of the more crazy season 4 eps are like that, they remind you of the sort of stuff that would have happened in season 2-3, only they didn't understand why the concept was funny. Season 4 was most successful when they tried to be more like season 1.