Doctor Who's Russell T Davies and Steven Moffat preview "emotional" Christmas special

what are Davies and Moffat’s secrets to telling a great Yuletide yarn? And what do they get up to at Christmas themselves? In [Radio Times'] exclusive fireside chat, they reveal all. Are you sitting comfortably? Then they’ll begin…

In which the writers of christmas episodes past and present discuss

• each other's christmas specials;
• how Joy to the world came about;
• why the Doctor doesn't just solve everything by going in the TARDIS;
• writing, and why AI won't steal creative writers' jobs; and
• what comes next on Doctor Who?