Episode 32 of The Trigan Empire
The Zota Club
aka The Hypnotist
Het hypnotisch medaillon (Dutch title)
The Hypnotic Locket (Dutch title, translated)
Written by Mike Butterworth
Illustrated by Miguel Quesada
The Zota Club was originally published in 6 instalments in issues 535 (15 April 1972) to 540 (20 May 1972) of Look and Learn magazine.
It is reprinted in Volume 3 of The Rise and Fall of the Trigan Empire (Rebellion).
MediaFire via British Comics Compilations