T cells are unique among the lymphocyte populations in their ability to further specialize as mature cells and become yet more mature. And T Cells come in many flavors, for example: the conventional TcRαβ T cells; the so-called unconventional TcRγδ T cells; NKT cells; and T regulatory cells (Treg). Details regarding the developmental and life cycle of the unconventional T cells are less well-described compared to the conventional T cells.