Good episode but not as good as part one. A bit borng.
Edit: After a re-watch a few years on, "borng" or boring(!) isn't the word that I would use. I guess the problem that this episode has is that Part One seemed to be far more exciting, tense and perhaps more funny. However this is still a great episode. I loved the way the writers kept you guessing throughout the whole episode and made a pretty good joke out of it being Homer and Smithers. A- although I can't help to think that this would be A/A+ if I could remember seeing this for the first time.