Donald Blake was a physician who worked in a hospital in Puente Antiguo, New Mexico. At some point, he was dating an astrophysicist named Jane Foster. The two later broke up, but Jane still held onto some of his clothes. While trying to help Thor avoid detection from the authorities, she gave him some of Donald's clothes and even forged an I.D. for him. Jane told Thor that Blake was a great doctor, but a terrible boyfriend. Later, when S.H.I.E.L.D. agent Phil Coulson met Thor, he sarcastically addressed him as "Donald", fully aware that this was an alias.