Episode 44 of The Trigan Empire
aka The Zootha Vorgs
De Vorgplaneet (Dutch title)
The Vorg Planet (Dutch title, translated)
Written by Mike Butterworth
Illustrated by Miguel Quesada
Planet Zootha was originally published in 5 instalments in issues 630 (9 February 1974) to 634 (9 March 1974) of Look and Learn magazine.
It is reprinted in Volume 4 of The Rise and Fall of the Trigan Empire (Rebellion).
Plot summary (Dutch)