I also re-watched "Yesterday Died" and it was great. That episode could appear on the surface to be not a very good one -- very little McGarrett is seen, and we know who the killer is from near the very beginning. However, it was excellent.

"Nightmare in Blue" is another "epitome of Hawaii Five-O" episode. The only part I didn't like was the very end, where McGarrett acted like a jerk regarding the rape victim who survived. When she called to talk to him (right after McGarrett killed the rapist), he said, "Tell her there's nothing to discuss!" Cold!