The big wedding day arrives and Firehouse 51 welcomes Casey back to celebrate the joyous occasion. Emma's plans to replace Violet come to a shocking end.

Season 12 of MASTERCHEF is all about redemption, when All-Star competitors from the last 11 seasons return to the show to see if they have learned from their past mistakes. For the first time ever, MASTERCHEF is re-opening the door to some of the most memorable and talented cooks in the competition's history, including two MASTERCHEF Junior Edition cooks now competing as adults! 40 chefs get called back to audition, but only 20 will claim a coveted white apron. The returning chefs compete in groups of four in head-to-head audition battles. In each round, the two chefs that create the most impressive comeback dish will secure a spot this season.

The Flash gets blasted with a shockwave forcing his body to age prematurely.

Jimmy reads his favorite tweets with the hashtag #AddAWordRuinAMovie before catching up with guests Jon Hamm, Jen Psaki and Jimmie Johnson.