Barry travels to Earth-3 to ask Jay Garrick for help against the looming threat of Savitar, while the team’s investigation of the Philosopher’s Stone points toward Julian. Julian struggles with his inner demons, and Wally reveals that he has been training with H.R.

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BARRY SEEKS HELP FROM JAY GARRICK

With Alchemy and Savitar still looming threats, Barry (Grant Gustin) is unable to focus on the Christmas holiday, and especially his relationship with Iris (Candice Patton). Determined to stop Savitar, Barry goes to Earth-3 to get advice from Jay Garrick (guest star John Wesley Shipp). Wally (Keiynan Lonsdale) wants to help Barry fight Savitar and reveals that he's been training with H.R. (Tom Cavanagh), which doesn't go over well with Barry. As Cisco (Carlos Valdes) faces his first Christmas without his brother Dante (guest star Nicholas Gonzalez), old wounds are reopened.

Rachel Talalay directed the episode with story by Aaron Helbing & Todd Helbing and teleplay by Lauren Certo (#309).