Doctor Who Extras

The four-minute Doctor Who story “Death is the Only Answer” aired during the final episode of the BBC’s recently-cancelled behind-the-scenes show Doctor Who Confidential.

It was written by a group of schoolchildren and produced during this season of Confidential, and it’s the first time Einstein has appeared in an episode of Who since 1987.

The other big part of the Doctor Who Confidential finale was a River Song chronology told by River herself, Alex Kingston. It explains, once and for all, the convoluted relationship between River’s timeline and the Doctor’s.

You can check out a rundown of the chronology at io9, but, as River would say, “Spoilers!”