It's time for another trip to The Library of Impossible Things.

This week Si is delighted to be joined one of his best friends, Jonno Simmons.

What object will Jonno bring to The Library? Why did Jonno end up giving his way his Doctor Who collection in 1977? What was Planet Skaro? Which story didn't actually have a special title sequence? How long did we queue to get the Talons DVD signed?

Find out the answers to these questions and more in this episode of The Library of Impossible Things.