With Mark Lawson.

The artist Marcel Duchamp is the focus of a new exhibition at the Barbican, London. The Bride and the Bachelors explores his influence on four great modern masters - composer John Cage, choreographer Merce Cunningham, and visual artists Robert Rauschenberg and Jasper Johns. Critic Jackie Wullschlager reviews the exhibition and discusses Duchamp's role in contemporary art.

Spooks star David Oyelowo returns to undercover duty in a new one-off TV drama Complicit. Oyelowo plays Edward, an MI5 officer doggedly on the trail of a suspected terrorist he believes is plotting an atrocity in the UK. On the line from Los Angeles, David Oyelowo discusses the appeal of drama based on the secret service.

While his translation of Brecht's A Life of Galileo opens at the RSC, playwright Mark Ravenhill is training for this year's London Marathon. Mark Lawson puts on his running shoes and joins Ravenhill at an early morning training session. While on the move, Ravenhill explains the parallels between acting and running, and why the Pope's surprise resignation is perfect timing for the production.

And in the week when it was announced that the TV drama The Hour would not be returning for a third series, leaving Freddie's fate undecided, ex-EastEnders supremo and TV producer Mal Young discusses the thorny subject of unresolved cliffhangers.

Producer Jerome Weatherald.