The purpose of this trial is to test the hypothesis that Resimmune can act as an immunomodulator of late stage metastatic melanoma when combined with palliative radiation to induce the priming of activated T cells with tumor antigens. The primary objective of this study is to determine the safety of combining Resimmune with palliative radiation therapy in patients with stage IV melanoma. A secondary objective is to document the tumor response and duration of response at irradiated and unirradiated sites (the abscopal effect). An additional secondary objective is to determine if T cell activation occurs following administration of A-dmDT390-bisFv(UCHT1) and local radiation to a metastatic lesion of melanoma.