Clark Johnson. Actor: S.W.A.T. - Die Spezialeinheit. Clark Johnson was born in Philadelphia, Pennsylvania, USA. He is an actor and director, known for S.W.A.T. - Die Spezialeinheit (2003), The Sentinel - Wem kannst du trauen? (2006) and Brawl in Cell Block 99 (2017). He was previously married to Heather Salmon.