Andrew Malkinson is Today's latest Christmas guest editor. He spent 17 years in prison for a crime he didn't commit before being cleared in July.

He uses his programme to look at justice and how one can cope with being locked up unjustly. He speaks to John McCarthy, who was held hostage for more than five years in the 1980s.

While in prison, the world of astronomy and space offered Andrew a sense of release and sanctuary from the immediate confines of his daily experience and a way to expand his world. So as part of his guest edit, he visits Jodrell Bank observatory.

And he tells Today's Justin Webb about the months since his conviction was overturned and how he still feels anger.