Goran Višnjić is a Croatian-American actor who has appeared in American and British films and television productions. He is best known for his roles as Dr. Luka Kovač in ER and Garcia Flynn in Timeless, both NBC television series. For ER, he and the cast were nominated for two Screen Actors Guild Awards. He is the son-in-law of Croatian film director and former head of Croatian Radiotelevision (1991–95), Antun Vrdoljak.

Luka Kovač is a fictional character from the NBC television series ER. The role was portrayed by Goran Višnjić from the sixth season episode, "Leave It to Weaver", which aired on September 30, 1999 until the thirteenth season episode, "The Honeymoon Is Over", which aired on May 17, 2007.