18/20 Matt meets investigators looking into the case of a widow who may have remarried. (R)
19/20 HMRC fraud investigators start looking into the world of garlic smuggling. (R)
Sarah Koenig re-investigates the real-life murder of teenager Hae Min Lee in 1999.
BBC Radio 4 Extra
Russell Brand challenges the viewpoint that the government's drugs policy is working. (R)