It took a while to figure out what the real story was, and there were a few really good ideas, but towards the end of season 3 the "Oh I can't risk losing you" even though the other option was the end of the world schtik got a little difficult. There are some episodes with really good science ideas that later disappeared and never were explained. Anna Torv did a really good job of playing two versions of herself, but she is the standout. Doctor Bishops assistant Anita is underused and was not afforded enough opportunities to make herself more than almost a character. The two Bishops got left driving the constant angst under beat that keeps the show from developing further in the plot and personality direction. Too bad that Leonard Nimoy only existed in some otherworld, and dies in the middle of the last season...watched it, but I think its overrated....