I stumbled on to this series about half way through an early episode purely by accident and within 5 minutes I was totally hooked - wow. My favorite programs are a combination of a great story, careful character development and excellent acting. This series has all these and more - the cinematography shows great sensitivity, the sets and costumes world class and even the theme music is mesmerizing. Each episode practically stands on it's own. It's the whole package.
Clair Foy is nothing short of brilliant - I have never seen a character that so completely captures your sympathies and heart. She is the perfect manifestation of beauty being so much more than skin deep.
Matthew Macfadyen is the idea counterpart and perfectly represents the goodness that mankind can (should) strive to achieve. The electricity between Matthew Macfadyen and Claire Foy is also magic.
Tom Courtenay performance is in many ways the most extraordinary of all. His role as William Dorrit is by far the most complex and challenging. Tom Courtenay's insight into this complex and rapidly evolving character is truly remarkable - I have seen very few that could compare. In my mind on the same level as George C. Scott in Patton.
The other supporting actors are also faultless almost to a man (or woman).
If you haven't seen this one - I suggest you do it's great and timeless entertainment.