Thomas Wlaschiha is a German actor and voice actor. Internationally, he is known for his roles as Jaqen H'ghar in the second, fifth and sixth seasons of the TV series Game of Thrones, as well as Sebastian Berger in the TV series Crossing Lines.
Wlaschiha was born in Dohna, East Germany. When he was 17 years old, shortly after the fall of the Berlin Wall, he traveled to Agawam, Massachusetts as an exchange student. He remained there for a year, acting in theater and studying English. He also speaks French, Italian and Russian.
Since 1998, he has played mostly supporting roles in numerous German and international TV and film productions. His first leading role was that of Stephan in the 2000 gay milieu study No One Sleeps. In August 2011, he was cast as the convict and assassin Jaqen H'ghar in the second season of the HBO fantasy TV series Game of Thrones, and has reprised his role in the show's fifth and sixth seasons, starting in 2015. He was nominated for Outstanding Performance by an Ensemble in a Drama Series Game of Thrones by the Screen Actors Guild Awards in 2016. Since 2013, he stars in the crime series Crossing Lines as Kommissar Sebastian Berger, a German police officer.