Well Captain Jack is now immortal thanks to Rose from back when she brought him back from the dead in the final scenes of the final episode of the Eccelston era of Doctor Who. Jack was explaining to Gwen the nOOb why he did not die when he was recently shot in the head in the first episode of Torchwood. She asked him 'Can anyone help you?' I think she was asking about helping him return to being mortal again. To which he replied 'I am looking for a good doctor to help me.' Or something similar to that.
That is yet ANOTHER similarity to Angel! Angel was an immortal vampire, Jack is an immortal bisexual.
hehe