Back from a successful run in Boston, Eileen, Julia and Tom are blindsided by both personal and professional obstacles as they seek to take "Bombshell" to Broadway. Karen consults her new mentor, Broadway star Veronica "Ronnie" Moore, as she finds herself on the brink of fame, but her success may come at cost to Ivy. A new talent is discovered in an unexpected place. Meanwhile, Derek copes with a damaging accusation.