Luke

Luke is a brilliant weapons officer. He believes wholeheartedly in his commander and will do whatever it takes to make sure the current mission is successful. Because of this, he earned high marks for reliability, teamwork, and ability to stay alert during extreme stress.

Galaxy
Luke is a crewmember aboard the USS Explorer. He was captured and taken to the mysterious Third Galaxy ship, which Ambassador Melaia and her team found. Luke was rescued, along with Mark and Vanessa.

Galaxy 4
It is revealed that Luke is now the Weapons Officer aboard the USS Savior, Captain McDonall's ship. When Melaia boards the ship, Luke greets her with open arms, happy to see her again before taking her to see the Captain.