The Journey Begins

"(Guys, I think we're go to London to rescue the Doctor)"

- (Alex telling his friends about his plan to go on an journey)

The Journey Begins was a first episode of The End of the World Rises of the Master

Plot
Alex, Lexi, Max, Jack, Molly and Emily are the six best friends from 6 different dimensions who have being best friends for a long time since they were kids.