Louis reser till Las Vegas och undersöker en ny typ av hypnositörer.
Stephen Fry looks for his Keys, with Isy Suttie, Tim Minchin, Bill Bailey, and Alan Davies.
Contestants try to score as few points as possible by plumbing the depths of their knowledge.
Stephen Fry considers the topic of Knowledge with; Jo Brand, Graham Linehan, and Alan Davies.
Stephen Fry looks into all things kinetic, with: Jo Brand, Danny Baker, and Alan Davies.
A look at what it takes to get new products from initial design to stores around the world. One of IKEA's newest designers Hanna- Kaarina Heikkilä wants to challenge mass production by creating an `imperfect vase' that has the finger-marks of the creator. She travels to China to see if her idea is possible.
Jeremy, Richard and James attempt to make train travel cheaper, faster and more interesting by replacing the conventional carriages and locomotive with a series of caravans.
Stephen Fry plays for keeps with Sarah Millican, Jason Manford, Bill Bailey, and Alan Davies.
Stephen Fry discusses knights and knaves with Victoria Coren, Sue Perkins, and Alan Davies.
Stephen Fry looks at everything in the kitchen but the sink with Victoria Wood and Richard Osman.
Louis Theroux travels to San Francisco where a group of pioneering medical professionals are now helping children who say they were born in the wrong body, transition from boy to girl or girl to boy at ever younger ages.
Following Mia Lundström as she takes on the company's biggest challenge in a generation: pushing into India with an aggressive expansion plan. Not only is IKEA bringing their stores and products, but their unique culture and values. With over a billion potential customers, how will the unique company brand work, will India understand IKEA?
Tapping into the US' deep-rooted belief in the American dream, billionaire businessman Trump promised to make all Americans wealthy again, but is he just helping the rich get richer? Ed's first stop is literally Donald Trump's backyard, his very own private members club, Mar-a-Largo in Palm Beach, Florida, where Trump can be found playing golf most weekends.
Chris Harris and the £2m Bugatti Chiron attempt to cross the Arabian peninsula faster than Matt LeBlanc and a roster of money no object transport solutions.
Stephen Fry lumps together a whole lot of L-themed larks, from lava lamps to love handles, with David Mitchell, Ronni Ancona, Jimmy Carr and Alan Davies.
David Mitchell is joined by Greg Rutherford MBE and Kirsty Young and Lee Mack is joined by Joanna Scanlan and Henning Wehn.
David Mitchell is joined by Jimmy Carr and Griff Rhys Jones, and Lee Mack is joined by Dave Myers and Susanna Reid.