Depression was a form of mental disorder.

In the Kübler-Ross model (commonly known as the five stages of grief), depression was the fourth stage. (PROSE: Shroud of Sorrow)

In December 1989, Ed Morgan was admitted to a mental asylum with severe depression and agoraphobia. He was released in January of the following year. (TV: Ghost Machine)

Amitriptyline was a drug used to treat depression in the 1950s on Earth. (AUDIO: Submission)

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