Diagnoses and Stage Disease: 1) Non-Hodgkin's Lymphoma (NHL): Patients with all histopathologic subtypes of Tac-expressing NHL are eligible. Patients with indolent NHL Stages II through IV are eligible if they have failed at least one standard therapy and have disease requiring treatment. Patients with aggressive NHL are eligible if they have relapse after standard chemotherapy and either are not eligible for or have refused salvage chemotherapy or bone marrow transplantation.