Luke started the 2008 season well but a broken bone in his hand in the round 3 loss to the Penrith Panthers sidelined him for 4 weeks. He came back in round 7 against the Brisbane Broncos and added some much needed spark to the team but they came up short going down 32 – 18. His return from injury came just in time for him to make his test debut for the Kiwis for the ANZAC day test at the SCG. He started the game at hooker and had a solid debut. Luke was named at halfback for the round 8 clash against the North Queensland Cowboys to accommodate both himself and fellow hooker George Ndaira in the starting side. During round 13 against The Warriors, Luke was instrumental for Souths, including setting up a great try to put Souths ahead at half time, and was named Man of the Match. In round 14 against the Gold Coast Luke scored his first career double and slotted the match winning penalty for a 24–23 victory.