All Isaac wanted to do was watch the new episode of the Spellgrove Show with Nigel - tonight he was interviewing Ailish Sinclair about her new book - was that truly so awful a thing? Did that universe really think he deserved to be punished for that?

Instead of disappearing when they regenerate, the previous incarnation remains around as a Ghost. When the Eleventh Doctor investigates Button House, he brings another face - and a whole pile of questions - with him.

As a surprise for Alison's Birthday, Mike attempts to uncover the Captain's name. He didn't mean to find anything else, really, he only wanted to give Alison a good birthday gift for once.

It should have been a pleasant day for Lady Fanny Button, watching her favourite show with no one to bother her. Except she finds that she's seen all the episodes of Murder She Wrote. But all is not lost, she'll just go and find Alison and get her to change the…Oh My God what are they doing in the Library!

All the Captain had wanted to do was watch his war documentaries, but when a sudden schedule change disrupts his plans, he finds himself wandering into the library in a desperate attempt to find some peace. He won't find any there of course. Instead what he'll find is Alison, and Robin, and a book that may just make him feel more than he's let himself feel in years.

Robin has been dead for a very long time. And the world might have changed a lot since he took his last breath, but people would always be people. Even if they stood not but three feet from the ground. Or the five Races Robin met in Life the one he met in Death

There are ordinary people and ghosts in Button House; could there be others there too?

Horrible Histories x BBC Ghosts crossover, contains spoilers for series 3 episode 1 of Ghosts ("The Bone Plot").

The Captain meets the Major