Baker is the Fire Chief in Wrigley, Pennsylvania, head of a unit that includes Adam Cross, Frank Whalen and Tony Diaz - or at least, it did. Adam's bizarre death leads Coulson's team to the area, and the subsequent similar passing of Frank sends them to the firehouse, where they meet Baker, and Tony, the last survivor of the 'helmet polishing incident'. Baker, on Coulson's unequivocal orders, evacuates the building, and leaves the agent in there with his man. After the detonation, he is presumably with the rest of the unit as they undergo decontamination and observation at a S.H.I.E.L.D. facility.