Terry O'Quinn has signed on for a recurring role in Hawaii Five-0.
The Lost actor will portray a Navy Seal Lt. Commander that trained Alex O'Loughlin's character McGarrett, according to TV Line.
The character will reportedly answer some of the questions pertaining to the mystery of who murdered McGarrett's parents.
O'Quinn joined a pilot titled Hallelujah in March, but the show failed to be picked up by ABC.
In 2010, the 59-year-old was cast in Taken From Me: The Tiffany Rubin Story opposite Oscar-nominated actress Taraji P. Henson.
Apart from Lost, O'Quinn has also starred on The West Wing and Alias.
O'Quinn was nominated for an Emmy last year for his portrayal of John Locke on Lost.
Locke is joining forces with Jin again
