Big Finish: The Light At The End

Big Finish have announced a special 100-minute story starring all five surviving classic series Doctors to be released for the 50th Anniversary. The Light At The End will see their paths suddenly intersect when they face imminent destruction . . .

The story is written and directed by Nicholas Briggs, who said:
As well as the Doctors, popular companions will also be involved from each era: for Tom Baker's Fourth Doctor it's Leela as played by Louise Jameson; then for Peter Davison there's Nyssa (Sarah Sutton); for Colin Baker's era there's Peri (Nicola Bryant); Sylvester McCoy's sees Ace (Sophie Aldred); and from the Paul McGann Big Finish adventures there's Charley, as played by India Fisher.

And if that wasn't enough, producer David Richardson added:
Released in November 2013, two versions of the story will be available: a standard two-disc release comprising just the episodes, and a limited edition five-disc release that will have two additional documentaries, plus Companion Chronicles tale The Revenants (performed by William Russell, previously available as a Doctor Who Magazine download).