I'd like to think that this isn't particularly credible, but, allowing for that, this is a well made and gratifying piece of television drama.
It's all built around a towering performance from Ray McAnally, who simply doesn't put a foot wrong. The blend of kindness and steel we see in his portrayal of Harry Perkins is perfect. He is ably supported by a cast of British stalwarts, of whom Keith Allen and Marjorie Yates deserve special mention.
Whatever your politics, it's impossible not to be swept along in the sheer exhilaration of the opening twenty minutes or so as Perkins wins a landslide victory in a General Election and becomes Prime Minister at the head of a radical Labour government. After that, the pleasure comes mainly in some clever scripting and interesting use of Mozart's music.
The conclusion is pleasingly ambiguous. Too many dramas these days wrap up everything neatly, giving us nothing to think about. That's not the case here.
Excellent effort all round then. Rating: 8/10.