At first, he tried to overthrow the pirates, but this proved to be unsuccessful when he was shot at and fell overboard.
As a result, he swam to a nearby island where he realised he had another injury with something stuck in his knee.
On the island, Jesse was able to patch up the wound with a plant and make a weapon using a rock, a branch and some vines.
After taking down three pirates, the team stepped in at the right time and was able to take the criminals into custody and keep the hostages safe.
NCIS Hawaii season 2 continues Mondays on CBS in the US and is available in the UK on Disney+