Episode 75 of The Trigan Empire
Submarine Mission
aka The Voyage of the Perici
Het slaapmonster (Dutch title)
The Sleep Monster (Dutch title, translated)
Written by Ken Roscoe
Illustrated by Gerry Wood
Submarine Mission was originally published in 6 instalments in issues 878 (11 November 1978) to 883 (16 December 1978) of Look and Learn magazine.
It is reprinted in Volume 6 of The Rise and Fall of the Trigan Empire (Rebellion).
Rating
Links
Plot summary (Dutch)