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)
Written by Mike Butterworth
Illustrated by Don Lawrence
The Mind Controller was originally published in 9 instalments in issues 709 (16 August 1975) to 717 (11 October 1975) of Look and Learn magazine.
It is reprinted in Volume 11 of The Trigan Empire—The Collection (the Don Lawrence Collection).
It is reprinted in Volume 5 of The Rise and Fall of the Trigan Empire (Rebellion).
Plot summary (Dutch)
MediaFire via British Comics Compilations