The finest finale:
Though it should really be considered as a piece with the previous episode, 'Once Upon A Time' with that magnificent Leo McKern performance (that nearly killed him!). Watching it today you just think 'how they did they get away with it'? Extraordinary television.
Conversely, McGoohan's prior series, Danger Man, whimpered out on the two frankly awful colour episodes, Koroshi and Shinda Shima, which were edited together into one film. They completely abandon the relative realism of the excellent black and white episodes for a fanciful plot about a secret martial arts cult in Japan whose members appear to be composed entirely of ageing British actors. A poor end to an excellent series (even the last black and white episode, 'Not-so Jolly Roger', is pretty bad compared to what came before).
I thought the Shanshu thing was more ambiguous than that - and it was Angel himself who supposedly signed it away. If Angel had to end, I thought that was a great finale - 'the battle continues' etc. For a series that was always very much about 'work' (right from season 1), ending on the line 'let's go to work' was just perfect.