The gang thinks they have found the perfect tunnels to access all of Swellview, until they are confronted by the tunnels' original inhabitants.

This insider special explores how comedian, Lilly Singh, went undercover as The Substitute to prank a group of unsuspecting students. Pop-up bubbles feature show trivia and behind-the-scenes secrets that reveal the making of this epic prank.

Young Eli's Comanche band are forced to survive on their own in 1852. In 1916, the McCulloughs search for Maria while Jeannie discovers a devastating secret.

Dr. Jeff treats a skittish Savannah cat with an unusual condition; Dr. Amy helps a beloved dog who was injured chasing a coyote; the team tries to find the owners of a dog rescued on the highway.

Zak and the crew stick together as they investigate a 127-year-old hospital in Colfax, Washington. The building may be abandoned, but it's far from quiet with reports of visitors hearing strange growls and being attacked by unseen hands.

Two couples team up to buy their dream vacation house on Deep Creek Lake, Maryland. Their agreed upon must-haves include water views and plenty of space for nine people. However, finding a property that both couples agree on may be a challenge.

Tired of waiting for justice in the suspicious death of their sister, two women search for answers. Secrets and suspects emerge, leading to a shocking arrest. But more women are found, frustration with police builds and fears rise of a serial killer.

Take your burger recipe to new heights with John's beef burger. Quick to whip-up and sizzling in seconds, pile the onions on, and top with cheese for an indulgent dish set to tempt taste buds.

Joh introduces the teams to a family torn apart by a devastating house fire. The remaining teams work harder than ever to give back and build a new home to bring this family back together.

Kicking off Sweet Week, molecular master Heston Blumenthal enters the kitchen with a mystery box for the contestants.

Harrow and Fairley are sent to a double-fatality in Fairley's hometown - a trip that will test their already-strained relationship.

Journalist and author Fareed Zakaria hosts this in-depth look at the major global developments of the week (the title's "GPS" stands for "Global Public Square"), with an emphasis on new ideas and innovative solutions to the world's toughest problems. Each episode also features Zakaria leading a panel discussion and interviewing a major world figure.

U.S. Speaker of the House Nancy Pelosi talks about Donald Trump, the tanker attacks in the Gulf of Oman, and how she would advise the 2020 Democratic candidates. Also, as Hong Kong fights back against Beijing's encroachment, Denise Ho - a protest leader - tells Fareed why taking a stand against China is crucial. Guests: Speaker Nancy Pelosi, Denise Ho, Anna Fifield.

A New York photographer climbs skyscrapers to capture a bird's eye view of the city; Louisiana stuntmen create illusions using explosives; a rock band films its latest music video in 4.3 seconds; Michael Grab balances rocks in impossible towers.

Giada De Laurentiis heads to Capri, a picturesque island off Italy's Amalfi Coast where she and her family have vacationed for many years. In this special spot, Giada enjoys lunch with her daughter, Jade, and highlights the flavors of the island in her menu of Aglio E Olio with Peas and Prosciutto, Fritto Misto, Mista Salad and Lemon Crepes with Almond Mascarpone.