Stop me if you've heard this one already:
Gorgoues ginger has boyhood friend who adores her. This boyhood friend grows up to be 'A Good Man' that eventually wins said ginger's affection. However, the good man is insecure about their relationship. He thinks he may love the ginger more than she loves him.
Enter a new man into their relationship. He's a 'bad boy'. He's a hero with a dark side. The ginger and the good man get engaged but the attraction between the ginger and the badboy seems palpable.
The three travel together and enter many dangerous situations. However, when things seem bleakest it's always the bad boy that comes to the ginger's rescue.
The sexual tension between the ginger and the bad boy becomes an issue in their relationship. The bad boy will not allow himself to entertain a relationship with the ginger. He is hundred of years old and will never age. When he's injured or near death he 'regenerates'. The bad boy has entered into relationships with human women before and lost them as they aged or left him.
The ginger and the good man get married. At some point the ginger is lost and replaced with a doppleganger who is identical to the ginger in every way. At some point they have a child that is taken from them. A child is taken due to it's genetic potential.
The child is taken to the far future and raised there as a gun-toting warrior. The child returns
to the present and interacts with it's parents. The child is now much older than it's parents. It keeps it's identity from them for quite some time until 'their darkest hour'.
Is this the plot to Series 5 & 6 of Doctor Who? No, it's a history of the love triangle between 'ginger' Jean Grey, 'good man' Cyclops and 'bad boy' Wolverine. The child? It's not River Song - it's Cable.
The similarities between X-Men and Doctor Who? Uncanny.