Episode 30 of The Trigan Empire
The Prisoner of Zerss
aka The Worst Man on the Planet
The Great Reign of Terror
De gevangene van Zerss (Dutch title)
The Prisoner Of Zerss (Dutch title, translated)
Written by Mike Butterworth
Illustrated by Don Lawrence
It is reprinted in Volume 8 of The Trigan Empire—The Collection (the Don Lawrence Collection).
It is reprinted in Volume 3 of The Rise and Fall of the Trigan Empire (Rebellion).
523 (22 January 1972)
524 (29 January 1972)
525 (5 February 1972)
Plot summary (Dutch)