In the fictional universe of Babylon 5, the Psi Corps is an agency of the Earth Alliance responsible for all humans with telepathic or other para-psychological abilities anywhere within Earth-controlled space. All persons with Psi abilities are required to either join the Corps, face lifetime imprisonment, or submit to a lifetime of drug treatments to suppress their abilities. Prolonged treatment with these drugs has a depressing effect. Susan Ivanova's mother committed suicide after ten years under treatment.
== Purpose and operation ==
The origin and early history of the Psi Corps are revealed...