In the world of cancer treatment, metastatic cancers—which occur when cancer cells spread from the original tumor to other parts of the body—represent one of the most difficult challenges for oncologists and patients alike. Traditional treatments, including chemotherapy, radiation, and surgery, often face limitations in effectively managing metastatic cancers. However, recent advancements in gamma delta cell therapy offer new hope in the fight against metastatic cancers, showing promising results and offering potential for long-term survival.