Sneed had informed them that the weakest part of the house, where most of the ghosts had been seen was the morgue, and that was where they all went. Jimmy was still a bit frustrated that Gwyneth had agreed to go along with the Doctor's plan, though in fairness, the Time Lord had made it clear that she didn't have to do anything.

"Talk about 'Bleak House,'' the Doctor said.

''The thing is, though,'' Olivia began ''There's nothing about corpses in 1869 in history. If this happens, then why don't we remember it?''

''Time's in flux,'' he explained ''It's changing every second. Your cozy little world could be rewritten like that.'' He clicked his fingers to emphasise the point. ''Nothing is safe. Remember that. Nothing.''

''Doctor, I think the room is getting colder,'' Charles said.

''Here they come,'' Jimmy said as the Gelth flooded into the room. The lead Gelth positioned itself in an archway.

''You have come to help! Praise the Doctor! Praise him!'' it said in a child-like voice.

''Are you gonna hurt Gwyneth?'' Jimmy asked.

''Hurry! Please. So little time. Pity the Gelth,'' it continued, ignoring Jimmy.

''I'll take you somewhere else after the transfer,'' the Doctor said, ''Somewhere you can build proper bodies. This isn't a permanent solution, alright?''

''My angels,'' Gwyneth said, ''I can help them live.''

''Okay, where's the weak point?'' the Doctor asked.

"Here, beneath the arch," the Gelth replied. Gwyneth stepped under the arch and faced the others.

''Beneath the arch,'' she confirmed.

''Establish the bridge, reach out of the void, let us through!'' the Gelth said.

''Yes!'' Gwyneth exclaimed, ''I can see you! I can see you! Come!''

''Bridgehead establishing,'' the Gelth said.

''Come! Come to me! Come to this world, poor lost souls!''

''It is begun! The bridge is made!'' the Gelth said triumphantly. Suddenly, many Gelth started pouring out of Gwyneth's mouth. ''She has given herself to the Gelth!''

''There's rather a lot of them, eh?'' Charles noted.

''The bridge is open. We descend!'' the Gelth said, before suddenly changing from blue to red, ''The Gelth will come through in force!''

''You said that you were few in number!'' Charles shouted.

''A few billion,'' it clarified, ''And all of us in need of corpses.'' The bodies around them began to rise.

''Gwyneth... stop this! Listen to your master! This has gone far enough. Stop dabbling, child, leave these things alone. I beg of you...'' Sneed implored.

''SNEED!'' Jimmy shouted as one of the corpses grabbed him from behind and a Gelth entered his body through his mouth. Sneed fell to his knees, and looked at them through cold, dead eyes.

''I think it's gone a little bit wrong,'' the Doctor said, earning him a glare from Jimmy.

''I have joined the legions of the Gelth. Come. March with us,'' Sneed said.

The corpses started to advance on the Doctor, Jimmy, and Olivia.

''We need bodies. All of you. Dead. The human race. Dead.'' the Gelth stated.

''Gwyneth, stop them! Send them back! Now!'' the Doctor commanded.

''Three more bodies. Make them vessels for the Gelth!''

''Doctor, I can't! I'm sorry. This new world of yours, it's too much for me!'' Charles said as the Doctor locked himself, Jimmy, and Olivia behind a dungeon door. ''I'm so...'' Charles was almost swooped by a Gelth, and fled the room.

''Give yourself to glory. Sacrifice your lives for the Gelth!'' the Gelth commanded.

''I trusted you. I pitied you!'' the Doctor shouted, disgusted.

''We don't want your pity! We want this world and all its flesh!'' the Gelth replied.

''Not while I'm alive!''

''Then live no more!''

''But we can't die here,'' Olivia started, '' we haven't even been born yet!'' Jimmy pulled her into a hug.

''I'm sorry,'' the Doctor said sadly, ''Time isn't a straight line. It can twist into any shape. You can be born in the 20th century and die in the 19th and it's all my fault. I brought you here.''

Jimmy placed a hand on his friend's shoulder. ''It's not your fault. We both wanted to come.'' Olivia nodded in agreement.

''What about me?'' the Doctor asked, ''I saw the fall of Troy! World War Five! I pushed boxes at the Boston Tea Party, now I'm going to die in a dungeon! In Cardiff!''

''I don't know what's worse. Dying or becoming one of those things,'' Olivia said.

''But we'll go down fighting, yeah?'' Jimmy asked. Olivia and the Doctor both nodded. The Doctor looked at his two friends.

''I'm so glad I met you both!'' he said.

''Me too,'' Olivia smiled, Jimmy nodding in agreement.

Suddenly, Charles ran back into the room. ''Doctor! Turn OFF the flame, turn UP the gas! Now fill the room, all of it, now!'' he commanded.

''What're you doing?'' the Doctor asked.

''Turn it all on! Gas the place!''

''Brilliant,'' the Doctor realised, ''Gas!''

''I suppose choking to death is better than becoming zombies,'' Olivia snarked.

''Am I correct, Doctor? These creatures are gaseous!'' Charles continued.

''Fill the room with gas, it'll draw them out of the host. Suck them into the air like poison from a wound!'' the Doctor said happily.

The corpses started to advance on Charles instead.

''I hope... oh, Lord. I hope that this theory will be validated soon, if not immediately,'' he said nervously.

''Plenty more!'' the Doctor said as he smashed a gas canister against the wall. The Gelth were sucked from the corpses with a scream.

''It's working,'' Charles confirmed. The Doctor and his friend came out of the dungeon.

''Gwyneth! Send them back! They lied, they're not angels,'' the Doctor told her.

''Liars...'' she said simply.

''Look at me. If your mother and father could look down and see this, they'd tell you the same. They'd give you the strength. Now send them back!''

He heard Jimmy and Olivia choking for breath behind him. ''Charles, get them out!'' he ordered.

''I'm not leaving her!'' Jimmy said.

''They're too strong,'' Gwyneth told him.

''Remember that world you saw? Jimmy's and Olivia's world? All those people - non of it will exist unless you send them back through the rift.''

''I can't send them back. But I can hold them. Hold them in this place, hold them here. Get out.'' She took a box of matches out of her pocket. Jimmy realised what she was planning to do.

''You can't!'' Jimmy said. Gwyneth told them to leave this place.

''Jimmy, Olivia, get out, go now, I won't leave her while she's still in danger, now go!'' Jimmy, Olivia and Charles fled the morgue. The Doctor held his hand out for the matches. ''Now give that to me.'' She did not respond. He placed a hand on her neck and realised she was gone.

''I'm sorry,'' he said mournfully. He kissed her forehead and thanked her before fleeing. Just as he ran out, the house exploded. He looked at Jimmy and Olivia mournfully.

''She didn't make it,'' Jimmy said.

''I'm sorry,'' he said ''She closed the rift.''

''At such a cost. The poor child.'' Charles said.

''I did try, Jimmy, but Gwyneth was already dead. She had been for at least five minutes,'' the Doctor explained.

''What do you mean?''

''I think she was dead from the minute she stood in that arch,'' the Doctor said.

''But she saved our lives!'' Olivia said.

''There are more things in Heaven and Earth than are dreamt of in your philosophy. Even for you, Doctor,'' Charles noted.

''She saved us all. She saved the world!'' Jimmy said.

The Doctor, Jimmy, Olivia, and Charles were stood outside the TARDIS.

''Right then, Charlie-boy, I've just got to go into my um... shed. Won't be long!'' the Doctor told him.

''What about you now?'' Jimmy asked Charles.

''I shall take the mail coach back to London. Quite literally post-haste. This is no time for me to be on my own. I shall spend Christmas with my family and make amends to them. After all I've learned tonight, there can be nothing more vital.''

''You've cheered up,'' the Doctor commented.

''Exceedingly!'' he said enthusiastically, ''This morning, I thought I knew everything in the world and now I know I've just started! All these huge and wonderful notions, Doctor! I'm inspired. I must write about them!''

''Is that a good idea?'' Olivia asked with a smirk.

''I shall be subtle at first,'' he explained ''The Mystery of Edwin Drood still lacks an ending. Perhaps the killer was not the boy's uncle. Perhaps he was not of this earth. The Mystery of Edwin Drood and the Blue Elementals. I can spread the word! Tell the truth!''

''Good luck with it. Nice to meet you. Fantastic,'' the Doctor said, shaking his hand. Jimmy and Olivia both shook hand with Charles and said their goodbyes.

''Hold on,'' he said ''I don't understand - in what way is this goodbye? Where are you going?''

''You'll see. In the shed,'' the Doctor replied.

''Oh, my soul. Doctor, it's one riddle after another with you. But after all these revelations, there's one mystery you still haven't explained. Answer me this - who are you?''

The Doctor considered for a moment, ''Just a friend. Passing through,'' he told him.

''But you have such knowledge of future times. I don't wish to impose on you, but I must ask you. My books. Doctor - do they last?''

''Oh, yes!''

''For how long?''

''Forever!''

Charles looked pleased and satisfied at this.

''Right, shed. Come on, you two,'' the Doctor said.

''In the box? All of you?'' Charles asked as they stepped inside.

''Down boy. See you!'' the Doctor replied, and stepped into the TARDIS followed by Jimmy and Olivia.

''Charles never wrote about blue ghosts, though,'' Jimmy said, ''Have we changed history?''

''In a weeks time it's 1870, and that's the year he dies. Sorry. He'll never get to tell his story,'' the Time Lord told them.

''He was such a nice man!'' Olivia said.

''But in your time, he was already dead!'' the Doctor pointed out, ''We've brought him back to life! He's more alive now than he's ever been, old Charlie-boy. Let's give him one last surprise.'' He set the TARDIS in flight.

That's 'The Unquiet Dead' then. Fantastic episode. I can't wait to do the next two episodes though. What I can say is that both Jimmy and Olivia have a completely different home dynamic to Rose, so a lot of their interactions in the next episode are vastly different.