Flashback

Frederick Fitzell is living his best life—until he starts having horrific visions of Cindy, a girl who vanished in high school. After reaching out to old friends with whom he used to take a mystery drug called Mercury, Fredrick realizes the only way to stop the visions lies deep within his own memories, so he embarks on a terrifying mental odyssey to learn the truth.

• 
  Dylan O'Brien

  Fred Fitzell
• 
  Hannah Gross

  Karen
• 
  Emory Cohen

  Sebastian
• 
  Keir Gilchrist

  Andre
• 
  Maika Monroe

  Cindy Williams
• 
  Liisa Repo-Martell

  Mrs. Fitzell
• 
  Amanda Brugel

  Evelyn
• 
  A.C. Peterson

  Mr. MacDonald
• 
  Aaron Poole

  Pierced Man
• 
  Maika Harper

  Tattooed Woman