Episode 03 of The Trigan Empire
Elekton In Danger
aka The Falling Moon (the Collection)
Laatste uur voor Elekton (Dutch title)
Last Hour for Elekton (Dutch title, translated)
Elekton In Danger was originally published in 14 installments in issues 24 (26 February 1966) to 37 (28 May 1966) of Ranger magazine.