Episode 27 of The Trigan Empire
The Unscrupulous Servant
aka The Imposter
De gewetenloze bediende (Dutch title)
The Unscrupulous Servant (Dutch title, translated)
The Unscrupulous Servant was originally published in 8 installments in issues 489 (29 May 1971) to 496 (17 July 1971) of Look and Learn magazine.
It is reprinted in the Don Lawrence Collection Volume 7, The Rallu Invasion.
Plot summary (Dutch)