Episode 13 of The Trigan Empire
Voyage to the Moon Bolus
aka The Invasion of Bolus (The Collection)
De waanzinnige geleerde / Duel met de dood (Dutch title)
The Mad Scientist / Duel with Death (Dutch title, translated)
Voyage to the Moon Bolus was originally published in 15 installments in issues 317 (10 February 1968) to 331 (18 May 1968) of Look and Learn magazine.