Chain Reaction

Tennant and Tate's tete a tete.

Catherine Tate is to interview David Tennant in the first of a new series of BBC Radio 4's Chain Reaction.

The lighthearted show's format is a form of 'interview tag', with each edition's interviewee going on to quiz a new guest the week after.

Next week, David will be chatting with Richard Wilson, who played Doctor Constantine in The Empty Child and The Doctor Dances.

Wilson, in turn, will interview one-time Big Finish audio Doctor Arabella Weir in the the third show.

Chain Reaction can be heard at 6.30pm on Thursday 21 February on BBC Radio 4. It will also be available via Listen Again for a further seven days.