TV Guide Dave Sunday

Simon travels the length of California. He climbs to the top of one of the world's tallest trees, and meets the fire crews tasked with tackling the ever-present danger of wildfires, a growing threat given the state's changing climate and chronic shortage of water. He also meets street doctors providing much-needed medical support to people living in extreme poverty and visits a city on the desert for Americans who have dropped out of the rat race entirely

The return of the documentary series that follows the investigations of specialist units within UK police forces created to crack the toughest of cases, from cyber heists, romance fraud and people trafficking to drug rings and murder. With access to some of Britain’s most talented detectives, the series explores the investigations, methods and evidence that has put some of the UK’s most dangerous criminals behind bars. Each episode features 'evidential police footage' as they take on criminals and hunt for clues to solve the cases. The series offers a first-hand experience of the work of the elite units on the front line while witnessing their bravery, skill and compassion amid tragedy and loss. The series also discovers how detectives operate in the interview room, how forensics bring a case into focus, and how expert CCTV and digital analysis create timelines and evidence to catch a criminal, and the impact these crimes have on the communities they serve. The suspicious demise of a woman at the cult-like Wiltshire retreat of a self-proclaimed 'healer' sparks a global investigation and a link to a death in Australia

Sandi Toksvig asks questions on the theme of reflections this week, with Joe Lycett, Zoe Lyons, Liza Tarbuck and Alan Davies trying to come up with interesting answers - while avoiding the most obvious ones

Rob Beckett, Miles Jupp, Romesh Ranganathan and Tiff Stevenson join regular panellists Hugh Dennis and Andy Parsons to give their irreverent takes on the biggest stories to hit the headlines in June 2015, through stand-up spots and improvised games. Chaired by Dara O Briain

Ed Byrne, Josh Widdicombe, Milton Jones, Zoe Lyons and Matt Forde join regulars Dara O Briain and Hugh Dennis to give their irreverent takes on the biggest stories to hit the headlines in July 2015, through stand-up spots and improvised games