Robert Downey Jr. in a 17th century wig and dress was enough to make me shudder, but I couldn't believe a great actor like Sam Neill actually took a part in this movie. The whole thing was unbelievable. I especially like Merivel's "cure" for the crazies. They dance...and hey presto! everyone's happy and they're all better! I guess I just didn't like the character Merivel too much. Therefore, watching a whole movie about his supposed transition from a whoring buffoon into a great physician was grueling.
Also, I'm not entirely sure, but I didn't think the plague as well as the famous fire of London took place simultaneously.