Two of country music's biggest superstars together and ET is the only show with them! Plus, more blockbuster secrets from inside "Comic Con." Huge "Marvel" movie surprises! The new female "Thor," new Scarlett Johansson "Black Widow" details and the A-list star joining "The Eternals." Then, the former "Beverly Hills 9-0-2-1-0" actress that's joining the cast of "Riverdale," and Tom Hanks dazzles as "Mister Rogers" in "A Beautiful Day in the Neighborhood." Entertainment Begins and Ends with ET!