The two main highlights for this season was the fantastic appearance of Leonard Nimoy once again bringing William Bell to life and maybe just maybe my favourite episode of the series (certainly this season) being "Letters of Transit" which introduced us to Etta and her world which was expanded upon in the fifth and final season. There must be something about episodes which twist the shows premise that I like, my favourite episode of Stargate Atlantis does something along the same lines.
Anyhow this isn't the greatest season of Fringe especially after the wonderful third season but there are plenty of good episodes and some excellent performances, I dare you to have a dry eye when Astrid and he counterpart are playing off each other:)
- Letters of Transit
- One Night in October
- Welcome to Westfield
- Making Angels