Once the MRI scan was done, Martha gave Jack a call before telling Amy and Rory anything. She told him that there was nothing wrong with his hearts or anywhere in the rest of his body. She told Amy and Rory leaving them devastated, her too.
They went in to see The Doctor, only to discover that he had a ring around his neck. It was just like the ones on his wrists, bloody and swollen. They could see it hiding behind his bow tie and his collar, which was now satined blood red.
Martha almost screamed, turning around to face the door, not wanting to look back. Amy was beside him, helping to stop the bleeding while Rory stitched it up. That was when a teenager stepped in, Martha went to shoo him out when she realised who it was. Luke was there, trying to hep his mum, Rani and Clyde catch a Slitheen in the building.
He looked at the body, only to see it was The Doctor (based after the episode "Death Of The Doctor", in The Sarah Jane Adventures), his heart beating rapidly as he saw the blood. You could hear Sarah Jane, calling out for Luke from the corridor. He didn't want her to see him this way so he ran out, acting like he didn't see anything. Rani had found the Slitheen and he was planning to blow up the hospital in 4 hours, but no one would ever listen to them.
She didn't know what to do so she called Torchwood, Gwen answering as Jack was busy. Sarah Jane swore she could hear a familiar voice in the background, when to her surprise, she heard the voice of one, Donna Noble. Sarah Jane had met her once when she was investigating a case, they were following a meteor all the way to her street and Donna recognised her name.
(What if Donna remembered and kept on remembering, after "The End Of Time part 2" and she didn't die, she just kept living her normal life hoping to see The Doctor again.)