John Rhys-Davies (Quillan Gornt) played Vasco Rodrigues in Shogun (1980). Additionally, Damien Thomas (Lando Mata) and Leon Lissek (Christian Toxe) were also in Shogun (1980), playing Father Alvito and Father Sebastio, respectively. Both of the miniseries are based on novels by James Clavell and part of his "Asian Cycle".
Struan was founded in 1841, and celebrates its 150th anniversary, meaning it takes place in 1991. Since the miniseries was broadcast in 1988, that makes it a "future history" story. Strictly speaking, it qualifies as a science fiction film.
Pierce Brosnan (Ian Struan Dunross ) and Julia Nickson ( Orlanda Ramos), who have very few scenes in this series, would go onto play the leads in the TV mini-series Around the World in 80 Days that came out a year later in 1989.
The trivia item below may give away important plot points.
James Clavell, author of the novel, is represented in that book by a writer named "Marlowe". Marlowe does not appear in the film, but his wife does. She's the pregnant woman who jumps off the burning restaurant with Linc Barlett.