Delta X-Ray Delta is the calling code for "Operation Bitemark" whose mission is to transport Alvin Murphy to California. Originally led by Hammond and taken over by Garnett upon Hammond's death, the team became the Westward-bound survivor group. Despite the group being disbanded in the final episode of season 2, the calling code stayed on, and is used again by the Eastbound group in season 4, and by the team in season 5.


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