This is a story about lives touched by rip currents, including a community trying to deal with a rip current problem, a scientist working to bring an end to rip current tragedies and people putting their lives on the line to rescue others.
When Oxford University scientist Hugh Sinclair claimed in the 1940's that the fatty acid Omega-3 found in fish was good for your health, he was ridiculed and lost his university post. But times have changed and this documentary looks at how Omega-3 is now being hailed as a panacea.
E-cigarettes are becoming increasingly popular, yet they're often at the centre of controversy. Dr Michael Mosley sets out to settle the debates about whether they should be banned in public spaces, and answers questions about their long-term safety.
In Australia, the move to legalise cannabis has gained momentum, thanks largely to the tenacity of Tamworth couple Lucie and Tony Haslam, who believed the benefits medicinal cannabis had on their dying son needed to be shared with the broader community. They were the driving force in co-ordinating an international symposium on medicinal cannabis, which helped shift the conversation from "if" to "when" cannabis would be legalised.
Michael Mosley investigates whether diet or exercise is a more effective way to keep kilojoules in check, and Saleyha Ahsan runs an experiment to find out whether probiotic products really can improve health.
Chris van Tulleken discovers whether red wine lives up to its healthy reputation, Zoe Williams looks at how sleep duration affects how much people eat, and Gabriel Weston witnesses the first operation of its kind in the UK - fitting a sternum implant made using 3D printing.