Qualifying rounds continue in Las Vegas on the world's most challenging obstacle course; the top 20 athletes of the night will advance to the semifinals.

When Kansas becomes a battleground in the national debate over slavery, settlers on both sides of the issue pour into the territory to determine its future as a free or slave state in its eventual admission to the Union.

The team goes to a college campus with a world-class observatory to discover who is using the Crystal of Dr. John Dee to steal people's memories, in order to own the future.

Jon Stewart breaks down Netanyahu's "urgent" strike on Iran's nuclear program, MAGA's sustained focus on battling protesters and immigrants in Democratic cities, and how Trump's unattended parade of weaponry explains America's muted response to the Minnesota assassination. "This isn't the most important message you'll hear tonight, but everyone should fight three teenagers once a year". John Mulaney, actor, writer, comedian, and host of the Netflix show "Everybody's Live", fought three 14-year-old boys on the finale of his talk show and lived to tell Jon Stewart the tale. They get deep into fighting strategies, masculinity, father-son competition, the guy who threw his shoes at George W. Bush, and more. Plus, a game of Daily Show Interview Guest Jeopardy.

Jimmy welcomes actor Javier Bardem, actress Carrie Coon, and comedian John Crist.

Stephen welcomes actress Mariska Hargitay and Senator Tammy Duckworth.

Salat and Veronica come to an agreement. Mo visits a prophet who uncovers the Mermaid's true purpose and the impending danger of the Khoi spirit.

Barry hitches a ride to the final frontier. As an operative's cover story begins to crumble, Luke and Emma seek help from an unexpected ally.

Facing a crossroads, the Valley Forge team must find a way forward as Will and Shane combine their strengths to snag a potential lifeline.

Aniela has a change of heart when it comes to the fate of the school, so she takes things into her own hands - along with a pair of unlikely allies.

Poh sets today's Sweet Week pressure test providing not one, but three of her extraordinary desserts for the cooks to replicate. Laura, Beau, Andre and Callum will battle it out to win immunity.

Meet hero Captain America and new baddie, Hydro-Man.