This week, Sir David Frost speaks to British tennis star and number four in the world, Andy Murray. Sir David travelled to Monte Carlo as the Masters commenced to speak to Murray about what it will take to win a Grand Slam, an Olympic Gold and get to the top ranking.

Murray says: "You need to get the balance right between training enough and not doing too much because there's so many big tournaments coming up one after another. You want to make sure you are fresh going into the tournaments but also physically in good enough shape to win them. It's a difficult season .... The difference between top tennis players and guys that are just below, it's mental strength and belief ... the ability to deal with pressure ... that's what separates the best players ... I haven't thought about finishing my career without having won a Grand Slam because I believe I will do it and that's what I'm working towards ... I just got to keep believing and working hard."

Singer and songwriter Aloe Blacc, who made a name for himself when he penned the hit song I Need a Dollar in 2010,  joins Sir David to discuss his music career, how he made more than a dollar or two and why he decided to turn his attention to people in Ghana suffering from Malaria.

Over the past four decades the US has spent billions of dollars promoting and supporting a military battle against drug cartels across Latin America. But global demand for illicit drugs has increased and the violence related to the drug trade has worsened. More than 50,000 people have been killed in drug-related violence in the last five years in Mexico alone.

Several leaders, including Otto Perez Molina, Guatemala's president, and Juan Manuel Santos, Columbia's president, are demanding an end to the 'war on drugs'. But Barack Obama, the US president, insisted at the recent Summit of the Americas that legalisation is not the answer. So what are the alternatives the to the 'war on drugs'?

Sir David is joined by Jorge Castaneda, the former Mexican foreign affairs secretary, to discuss the global war on drugs and the summit.

The magician and intellectual property lawyer Andrew Eborn has a trick or two for us and tells us whether or not it is possible to steal a magic trick.