Slavery is commonplace on the planet Elekton.
Trigo himself gets captured and enslaved on numerous occasions in tales of the Trigan Empire. So too do his brother Brag and his nephew Janno—sometimes all three together!
Trigo gets captured and enslaved by desert warriors and borne back to their city or citadel—on at least three occasions—pictured above.
The first panel is from the tale Imperial Walkabout (1977) and is painted by Oliver Frey.
The second panel is from the tale The Stone of Vorg (1974) and is painted by Philip Corke.
The third panel is from the tale Elekton in Danger (1966) and is painted by Don Lawrence.