The show, Outlander, has been filmed across Scotland, including in Pollok Park, and Glasgow's civic heart is the latest in a series of locations to be featured.
Based on the best-selling novels of US author Diana Galbaldon, the show follows the adventures of a 20th-century nurse, Claire Randall.
Claire is played by Irish model and actress Caitriona Balfe, as she travels back through time from 1946 to 17th-century Scotland.
Doune Castle and Loch Rannoch in Perthshire and Culross in Fife have also been used to film scenes for the drama.
Sixteen episodes of the "high end" TV drama, which is also being shot in a purpose-built studio in a warehouse in Cumbernauld, will be shown in the summer on the Starz network in the US.
Its co-producers, Sony Pictures Television, are in talks with numerous networks around the world, although no deal has yet been struck for it to be shown in the UK.
Much of the Scottish parts involve speaking Gaelic, which will be presented on the show with no subtitles - the actors have learned the language from Gaelic tutor Adhamh O Broin and non-Scottish actors have received help in Scottish accents and language from dialect coach Carol-Anne Crawford.
Heughan and Balfe have already attended a fan event in Los Angeles that attracted 2000 people.
The first screening on US TV will be on August 9.