Things bottom out on the basement level when a team of brawny bros takes on a trio of co-workers who met on the job.
A fresh crop of victims, er, players take on the planetarium level, where the Earth really is flat and giant red buttons are sometimes best avoided.
There's no rest for the wicked as three tenacious teams of two compete to survive a perilous journey across a booby-trapped and lava-filled bedroom.
In the season finale, host Rutledge Wood welcomes three new teams — including a trio of social media mavens — to the hottest party in town.
The summer team tries to find clues of what could have happened during the winter, unveiling a first possible suspect.
Tom uses Ben's Invention to see Roy's Secrets inside his Mind.
On the celebs' TV this time - Countdown, Sex in Lockdown: Keep S**gging and Carry On, Big Brother: Best Shows Ever, Scarface, Us, First Dates, and BBC News.
Raph is mistaken for a heinous criminal in the Hidden City.
Leo's efforts to get into an exclusive Hidden City spa threaten to unweave his day of relaxation.
Splinter's magical day with Mikey is interrupted by a mysterious and tiny guest.
In a desperate attempt to avoid going to Charlotte's bassoon performance, Coop, Cami and Fred come up with an elaborate scheme that involves them crashing a wedding.
A train journey across Sri Lanka along one of the world's best-preserved Victorian railways. The trip begins in the coastal city of Colombo and moves on to the country's cultural and spiritual heart in Kandy. The journey continues through a a very English town that produces some of the world's finest teas, coming to a stop at a hill station surrounded by tropical forests close to one of the world's most spectacular viaducts - the Nine Arch Bridge.
On the latest leg of his road trip, Zuu ventures into the unknown - travelling from his native West London, all the way to Hackney in East London to cook for comedian Jamali Maddix.
Challenging the notion of a blank slate, three studies explore how babies are born with expectations about everyday life.
From curiosity to understanding: researchers unveil the surprising ways that infants learn how to anticipate and respond to the movements of others.
Several experts make sense of how babies touch, taste and see as they embark on a sensory journey that will shape the rest of their lives.
A coy smile, a puppet show and a pointed finger lead to discoveries in how babies get along with others using humor, morality and shared experiences.
Resolving the debate of nature versus nurture, three scientists show how genetics and environment work together as infants discover who they are.