There's a new doctor in Central City, and he's got everyone's pulse racing!
While Barry (Grant Gustin) and Iris (Candice Patton) deal with the heartbreaking loss of their daughter, Nora, the team faces their greatest threat yet - one that threatens to destroy all of Central City. Meanwhile, Killer Frost (Danielle Panabaker) has a brush with death that results in an unexpected new dynamic that will change her relationship with Caitlin forever.