Before the screen partnership, Son Suk-ku made Eita a practice recording

Before following a case together, the actors worked on each other’s language.

Netflix’s official teaser introduces The Blue Road, starring Son Suk-ku and Eita Nagayama as detectives pursuing cross-border murders. Release is set for November 20.

Early episodes screened in Busan. Interest in the new teaser overlaps with expectations for the pairing established there.

Reporting after the Busan screenings described praise for the leads’ energy, the detectives’ humor and Kim Shin-rock’s presence—individual early impressions.

The language practice offers a concrete glimpse of how one actor supported another.

iMBC’s October 9 event report highlights Son recording Korean dialogue for Eita, who said he listened and practiced.

The official teaser was shared in Korea on October 23. The full series is still to come.