Finally he’s (the Doctor) put in the position again where instead of giving your life for Time Lords and Daleks and great big mythological concepts that are very much offstage…it’s for Rose. It’s for that 19 year old shop girl from Planet Earth who is braver than brave and more loyal than anyone else in the universe. She is dying and he’s giving his life for her. Never mind wars. Never mind epic mythology. Never mind all that grand stand stuff. It’s absolutely personal and he’s at his most human. Right at the end he does a very human thing and gives his life.
“I think it broke our hearts, we loved those actors, but frankly, sometimes that’s good drama. If the death of those two wasn’t magnificent then I don’t know what is.”
Russell T. Davies
re: Jack and the Doctor:
“They’re both unique in the universe and actually throughout all these problems, throughout all this prejudice, it’s their similarities that allow them to become friends and their good hearts that just binds them together.”
And then..
“It’s troubling, it’s puzzling, it’s fun and he experiences all these things in a fantastically sensual and physical and Jack Harkness type way and that haunts him.”
“Jack Harkness had been introduced to enormous success and that’s just down to John Barrowman really. He’s a most incredible man and made the most incredible impact. He literally became a sensation overnight. And it was this extraordinary character. We just thought, he’s bigger then just a companion aboard the Tardis in a way, He’s an omnisexual, swaggering lover of a hero and how could I not want to do more with a character like that?”
Russell T. Davies gushing about Jack Harkness and John Barrowman