Episode 53 of The Trigan Empire
The Mind Controller
aka The Convicts
Torga’s Mind Controller (The Collection)
De geheimzinnige stem (Dutch title)
The Mysterious Voice (Dutch title, translated)
The Mind Controller was originally published in 9 installments in issues 709 (16 August 1975) to 717 (11 October 1975) of Look and Learn magazine.
It is reprinted in the Don Lawrence Collection Volume 11, The Sun-Worshippers.
Plot summary (Dutch)