While not as heartbreaking as the episode "Leo" this was pretty sad, the ending mostly. I kinda have sympathy for Josh, but I also loathe him a bit. I feel bad that Sam had to marry that guy, knowing she really doesn't want to deep down inside. But whatever, thats her problem now. The writers showing the 2003 blackout was really interesting.
I really wish Sam had not taken that jerk back the following day. That means Erica went back in time for basically nothing. Her sister was real mean, saying "after tonight, I never want to talk to you again". Overall, great episode, I really felt for Erica.