Titans Wiki

"I help people that others have given up on. I go beyond what medical science is willing to do... because I believe in hope. Don't you?"
—Niles Caulder to Rachel Roth[src]

Dr. Niles Caulder[1], also known as the Chief, is an experimental doctor and pioneer in medical science.


Early life[]

At some point, Caulder and Cadmus Laboratories ran into each other.[2]

In 2016, Dr. Caulder cured Gar Logan of a rare disease in the Congo. By 2018, Caulder lived in a house in Covington, Ohio with Gar, Cliff, Rita Farr, and Larry, where he performed scientific experiments in the hopes of bettering medicine. At some point, he had lost the ability to walk, but soon learned how to again.[3]

Meeting Rachel[]

Leaving to retrieve the dying body of Shyleen Lao, Caulder returned, surprised to find Rachel Roth in his house. Before anything, his adopted family assisted Caulder in stabilizing Shyleen, as she'd been in an accident and her body was freezing. Rachel intervened, helping to calm Shyleen down and allow an injection of Caulder's to work. Following this, Caulder scolded Gar for having brought Rachel into their secret circle, but reminded him that he cared for him. They all joined together for tea, where Dr. Caulder explained to Rachel who they were, that he'd helped all of his subjects to live again after various accidents. Hoping to help Rachel, she was put on to a medical table and strapped down. Deciding to back out of the experiment, Rachel pleaded to be let go, but Gar's attempts were stopped by Caulder. Rachel ultimately broke free, using darkness to pick up and throw around the doctor, breaking his back once more.[3]


"Who's the Chief?"
"Well, he's the greatest doctor in the world. Saved all of us.
Rachel Roth and Gar Logan[src]
  • Expert scientist: Caulder possesses an incredible scientific knowledge, being able to save Cliff's brain after a horrific accident, transferring it into a robot body, as well as saving Gar Logan from an otherwise rare disease.[3]He was able to understand and help Rita and Larry with their unique conditions when no other doctor could.
    • Medical knowledge: Caulder's knowledge of medicine allowed him to save Gar in a short span of time.


"His back is broken again. We'll take care of him."
Larry to Gar Logan[src]
  • Paralysis: As a result of Rachel Roth's attack, Niles is paralyzed from the waist down again.
  • Restricted mobility: Due to his spinal injuries and subsequent paralysis, Caulder is restricted to a wheelchair, which hampers his mobility.[3]


  • Wheelchair: Due to Caulder being paralyzed, he is forced to use a wheelchair in order to move.[3]


Season 1[]

Season 2[]

Behind the scenes[]

  • In the comics, Niles Caulder, aka the Chief, is a brilliant scientist and leader of the Doom Patrol.


  1. Gorenberg, Jamie (writer) & Sullivan, Kevin (director) (November 8, 2019). "Fallen". Titans. Season 2. Episode 10. DC Universe.
  2. Gorenberg, Jamie (writer) & Sullivan, Kevin (director) (November 8, 2019). "Fallen". Titans. Season 2. Episode 10. DC Universe.
  3. 3.0 3.1 3.2 3.3 3.4 Johns, Geoff (writer) & Fawcett, John (director) (November 2, 2018). "Doom Patrol". Titans. Season 1. Episode 4. DC Universe.