In the new issue of Radio Times, Andrew Marr talks to David Hockney - appointed a member of the Order of Merit in the 2012 New Year Honours List - and discovers how our greatest living artist keeps his mind young.

We celebrate one of the world’s most recognisable image-makers with four RT covers and there are exclusive postcards free inside every issue!

Also this week:

Our essential guide to the people, shows and events you must not miss in 2012

Mark Gatiss, co-creator of Sherlock, unleashes his version of The Hound of the Baskervilles – and don’t miss your chance to collect three exclusive Radio Times book editions of some of the Baker Street detective’s most famous cases

Michael Morpurgo reveals the message behind Steven Spielberg's epic War Horse

Professor John Sutherland unravels the plot of Dickens’s unfinished novel, Edwin Drood

Gardener Joe Swift and radio presenter Fi Glover compete in a Bake Off challenge – and you can get in on the cookery action with Mary Berry’s recipe for meringues

We unveil the shortlist for the National Television Awards – get voting!

Sharon Horgan, presenter of new Channel 4 documentary series How to Be a Good Mother, says working mums can have it all

Casualty moves to Cardiff – but viewers aren’t meant to notice

We find out why Alan Titchmarsh is traipsing indoors to present a classical music show

Countdown’s new host  Nick Hewer reveals he loves Miranda – and a good claret in front of the TV

Next week in Radio Times…a free star gazer’s guide to the night sky with our Brian Cox wall chart… Madonna brings Wallis Simpson to life…plus collect your third free Conan Doyle classic… On sale Tuesday 10 January.