Study of ONTAK and CHOP (chemotherapy drugs) to find out their ability to make Peripheral T-cell lymphoma disappear (for any period of time) and potentially lengthen life. The study will also compare what kind of side effects these drugs cause and how often they occur. The hypothesis is that patients with newly diagnosed peripheral T-Cell lymphoma, when given ONTAK + CHOP, will tolerate the treatment and will have a 20% improvement in response rate when compared to CHOP alone.