Don Cheadle, Joshua Jackson, Ed Begley Jr. and the U.S. secretary of energy delve into the dangers we're facing and steps everyone can take to help.

Rob Lowe dishes on his brutal Comedy Central roast and life as a Hollywood heartthrob. With comedians Nick Kroll, John Mulaney and Russell Peters.

Krysten Ritter hails the cliché-crushing power of Jessica Jones. Rumer Willis pushes back on doctored photos. Plus, the inside story of "Amanda Knox."

Chelsea's bid to become a Lyft driver turns tense when she takes her mentor on a hair-raising ride. With Taylor Lautner and the Property Brothers.

Education Secretary John King quizzes Chelsea on geography and more. Glennon Doyle Melton calls out toxic messages to girls. Plus, Jennifer Connelly.

Comedian Kevin Hart talks fame, marriage and the mistakes of his past. Jesse Ventura slams the "rigged" election. Larry King moderates a mock debate.

Chelsea sits down with Hilary Swank, Ava DuVernay, Connie Britton and the reigning Miss USA to talk ambition, sexuality, burning injustices and more.

Tyler Perry reflects on a wild twist of fate, his foray into fatherhood and buying an Army base. With Cobie Smulders and Vice's Alyssa Mastromonaco.

Grammy winner Meghan Trainor dishes on her new beau, her creative process and more. Plus, Priyanka Chopra and transgender Senate hopeful Misty Snow.

Felicity Jones and Ron Howard talk "Inferno," awkward auditions and the closely guarded secrets of "Rogue One." Norah Jones hits the stage to perform.

Nicole Richie opens up about her transformation from rebellious youth to poised mom and women's advocate. Plus, "Moonlight" star Trevante Rhodes.

Sarah Jessica Parker, Morgan Spurlock, Trevor Noah and Julianna Margulies talk friends, parenting, work and the bonds that have shaped their lives.

Sally Field offers a defiant response to Trump's victory. Jacob Soboroff explains the recount process. Plus, Jason Biggs and a tribute to Mrs. Brady.

Common looks back on Obama's impact, country star Maren Morris marvels at her wild year, and journalist Lauren Duca dissects lies by Trump.

Jennifer Aniston talks "Office Christmas Party" and her ideal superhero role. Fetty Wap explains his stance on guns. Chelsea gets high with her staff.

NeNe Leakes, Clay Aiken and fellow "Celebrity Apprentice" alums dissect the GOP nominee's appeal. Comedian Jim Jefferies poses with male strippers.

Jason Biggs hops into the pool with the U.S. men's Olympic water polo team. The irrepressible Denis Leary riffs on his wild past and 27-year marriage.

Actress Cara Delevingne works to empower girls, tech leaders weigh in on cutting-edge automation, and Garbiñe Muguruza savors her big Wimbledon win.

The country star reveals how girlfriend Gwen Stefani upstaged him on his birthday. Former congressman Barney Frank shares his ideal Democratic ticket.

Comedy legend Carol Burnett shares the joys and hazards of hosting her own variety show in the 1960s. With Rob Corddry and ESPN's Jessica Mendoza.

Chelsea grills Milo Ventimiglia on the "Gilmore Girls" revival and his "This Is Us" physique. Kyra Sedgwick reflects on her 28-year marriage.

Jessica Chastain shares her grandmother's saucy advice, Chelsea makes a bet with Dale Earnhardt Jr., and Van Jones rebukes Democrats and Republicans.

Susan Sarandon breaks down the dramatic Dakota pipeline standoff and the #BankExit push. Gael García Bernal extols the pleasures of mezcal and Venice.

Kate Hudson recalls a magical holiday, LA Mayor Eric Garcetti shares his plea to Donald Trump, and Cameron Dallas and friends talk social media fame.

Tracee Ellis Ross, Aisha Tyler and Rosario Dawson join Chelsea to scorch Trump's first 100 days in office. Sen. Cory Booker urges political integrity.