Inhabitants of the Tantalus colony in 2266.
Named personnel
Unnamed personnel
Guard
A guard
The guard was stationed on the Tantalus colony penal center and was in charge of the inmates. (TOS: "Dagger of the Mind")
- The guard was played by Lou Elias.
Inmate
An inmate
This inmate was criminally insane and received therapy at the penal colony. He was subjected to a new experimental therapy device called the neural neutralizer. (TOS: "Dagger of the Mind")
- The inmate was played by Ed McCready.
Therapist
A therapist
The therapist assisted Dr. Adams and Dr. Van Gelder on the Tantalus penal colony where the neural neutralizer was used to treat the criminally insane. (TOS: "Dagger of the Mind")
- The therapist was played by Walt Davis.