7. Rise of the Cybermen/Age of Steel
The Doctor, Rose and Mickey fall through a crack in time and land on a parallel Earth, where Rose has never been born, Pete, her dad, is still alive, along with Mickey's granny. The Cybermen are taking over the planet, Jackie dies, and Mickey becomes a force to be reckoned with; in this episode, he becomes a man. At the end, he decides to stay, to have a reality where he can make a difference in the world, even if it means never seeing Rose again; he realizes her heart will always belong to the Doctor.
The Questions: What would your perfect life look like on a parallel plane? What changes could you make in your current life, right now, to make that perfect life materialize?