Junior helps McGarrett search for Lincoln Cole, an anonymous good Samaritan who's in the crosshairs of some very dangerous people.

Lincoln Cole is an anonymous good Samaritan who's in the crosshairs of some very dangerous people.

Grover and Five-0 seek Lincoln Cole (Lance Gross), an anonymous good Samaritan who's in the crosshairs of some very dangerous people.

McGarrett receives a posthumous letter that contains a cipher from his late mother Dolores.

McGarrett tries to contain Lincoln Cole, an anonymous good Samaritan who's in the crosshairs of some very dangerous people.

Sergeant Major Phillips works to protect Lincoln Cole, an anonymous good Samaritan who's in the crosshairs of some very dangerous people.

Danny is attacked by someone willing to kill to steal the cipher sent to McGarrett by his late mother.

Quinn and Tani and the rest of Five-0 seek Lincoln Cole, an anonymous good Samaritan who's in the crosshairs of some very dangerous people

Someone is willing to kill to get ahold of a letter sent posthumously from Steve's mother on Hawaii Five-0. "A 'ohe ia e loa'a aku, he ulua kapapa no ka moana (He cannot be caught for he is an ulua fish of the deep ocean)" is the 21st episode of the show's tenth season.