Disclaimer: This is for the rest of the story, because I always forget to put them in here. I don't own anything except the plot.

Now, to explain where this is on each characters timeline.

Amy and Rory: Shortly after The Power of Three, before Angels Take Manhattan

Donna: Set after the End of Time. This one takes a little explaining. So for the purposes of this story, when that little safety feature on Donna's memory wipe activated it erased all the memories she got from the Meta-Crisis.

Hope that makes sense, now on to the story.

Captain Jack Harkness and Martha Jones appeared on a hill on the outskirts of London. They turned around and saw an old man with white hair watching them. The old man didn't look frightened or astonished, instead he looked happy.
"Are you aliens?" Wilfred asked.
"Nah. I'm Captain Jack Harkness and this is Martha Jones. We're friends of the Doctor. We need Donna's help." Jack said quickly.
Martha set her bag down on the hill and prepared to explain things to this man. Just then Donna walked onto the hill.
"Captain Jack Harkness and Martha Jones, was it?"
"It's actually Martha Smith now, a fact Jack is always ignoring."
"Donna, you know these people? Wilfred asked.
"Oh yeah, I meet them while I was traveling with the space boy." Donna replied
"Captain Jack Harkness, at your service." Jack said.
Martha spoke before Donna could reply. "Stoppit Jack."
"I was just saying hello" Jack whined.
"We all know you're never just saying hello, Jack. Anyway, we are here for a very important reason." Martha said.
"Right, Donna can you come with us. The world is in danger and the Doctor needs our help."
Donna nodded. "Of course I'll come. The Doctor is my friend. Where are we going and how are we getting there?"
"We are going to New York and we are going to use my vortex manipulator to get there. All you need to do is place your hand on it and we'll be off." Jack explained.
Martha picked up her doctors bag, then she and Donna placed their hand on the vortex manipulator. Jack hit a button and they vanished.

River and Clara appeared outside of a house on Baker Street. It was a pale blue house near the end of the street with a red car in front of it. They rang the bell on the house and waited. As they waited, they heard gunshots from somewhere down the street. Clara looked around, alarmed but River just ignored them.
"Don't worry about it, Clara. It's just the people who live down the street. This happens at least once a week." River said.
The door opened and woman with fiery red hair greeted them.
"Hello River." She said.
"Hi Amy. This is Clara Oswald. We need you and Rory to come with us." River said.
"Why?" Amy asked.
" The world is in danger and the Doctor needs our help." River replied.
"Rory come on, we're going on a trip!" Amy shouted into the house behind her. While they waited they heard more gunshots. Then a police car went up the street, slowly, almost lazily, heading in the direction of the gunshots.
A minute later, Rory appeared behind Amy.
"Good to see you again, River. Where are we going?" Rory asked.
"Rory, this is Clara. We're going to New York. Everyone put your hands on my vortex manipulator and we'll be off." River said.
Everyone placed their hands on River's vortex manipulator and they vanished, just as another gunshot was heard.

Jack, Martha, and Donna appeared in Central Park. They had just sat down on a park bench under a willow tree when River, Clara and the Ponds appeared a few feet away. Everyone walked over to one of the pavilions and sat down at a table so they could all hear. Martha tucked her bag under the table.
Donna spoke up. "Will someone explain what the hell is going on here?"
"River, I think that would be your cue." Jack said. He smiled. It would be good to finally get answers. Martha started absently drumming a four beat rhythm on the table. Donna frowned a little, realizing someone she had expected to be here was missing.
"Why don't we go ahead and make introductions before I start explaining what's going on." River said.
"Captain Jack Harkness."
"Martha Smith."
"Donna Noble."
"Amy Pond."
"Rory Williams."
"Clara Oswald."
"River Song."

Clara pulled out her phone to try and find out some information on everyone, while Amy and Rory smiled, having heard some of the names before.

"Now tell us what's going on." Martha said.

Hope you all enjoyed that chapter. I am definitely open to suggestions, so feel free to PM or review if you have any.

It is a kinda slow chapter, but I have plenty of action planned soon, so just bear with me.

Thanks to all the people who reviewed, favorited, or followed this story.