The auditions conclude with creator and executive producer Simon Cowell at the judges' table along with Howie Mandel, Heidi Klum, Sofia Vergara, and host Terry Crews. A variety of acts and contestants of all ages audition for the chance to win the $1 million prize, and the judges deliberate on which acts will make it to the live shows.

The Flash enlists a host of speedster allies, including Iris and his children from the future-Bart and Nora West-Allen - to end the speedster war and defeat a deadly new adversary: the villainous Godspeed.

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Ruth takes Barry to the Rakudushis, Ellie reveals her ambitions to Allan, Hunter authorizes a risky military operation, Lilly lays down ground rules for Donald, and Priscilla confronts Sam.

The Unit competes for a chance to commune with the dead during Samhain. Scylla and Anacostia search for Camarilla leadership by attending a Halloween gala and make a horrifying discovery.

Superman pays a visit to Morgan Edge. Meanwhile, Lois and Chrissy work together on a story. Lastly, Jonathan finds a welcome distraction during a very stressful school day.

Sig makes a desperate bid to save his gear from the descending ice pack while Jake dumps pots to avoid capsize. When Wild Bill gets a line caught in his propeller far from Dutch Harbor, he enlists Jake's diver to attempt a risky underwater repair.

Contestants must build an exact replica of Will Arnett's Lego Lamborghini from memory.

The training and development of professional Ultimate Fighters.

Deonn credits lanise for making him a better man in the two years they've been dating, but he never can get her to meet up irl! deonn begs nev and kamie for help, but as they dig, they uncover more dirt than deonn is expecting.

David creates a plan to shift negative attention away from his redevelopment project, and it involves his brother. Plus, Nicole and David's relationship stalls.

The wagon train must ford a dangerous river, leading to a moral struggle between Ezekiel and Benny over the soul of the group. Meanwhile, Prudence and Todd meet hipster pioneers living #wagonlife.

Jimmy reads his favorite tweets with the hashtag #DescribeASportBadly, then catches up with the Jonas Brothers and Zoe Lister-Jones before welcoming musical guest Omar Apollo.

Stephen welcomes actor Jason Sudeikis and a musical performance by Yola.

While attempting to cover her trail for fueling gossip about Aneesa, Devi's guilt grows. Nalini warms up to a nemesis. Kamala gets a rude shock.

When a venomous bush viper swallows Rocksy, the Mighty Ones must venture into the snake's stomach.

Duntsch attempts to fix a disastrous surgery; Shughart builds her case against Duntsch.

Aine and Richard have some awkward hiccups as Shona attempts to restore a friendly working relationship with Charlotte.