A ruined masterpiece House of cards could have been a memorable television series. A concentrate of tension and narrative power, but it was completely ruined with the fifth season, with the expulsion of Kevin Spacey and with the production of the sixth season. You can not create such a product, based so strongly on a character and then start replacing it and sending it away as if nothing had happened. Imagine if, in the fifth season of "Breaking bad" Skyler White had started to have more importance than Walter White and then, in a sixth season, they decided to kill Walt in a completely random way and make her protagonist. Never again.