Theodore Calvin, (referred as T.C), is one of Thomas Magnum's friends that have been with him since the Vietnam war, he is the owner of the Island Hoppers sky transport service. He helps Magnum or others travel around the islands. He does not like being involved in Magnum's cases. But he will sometimes help. He and Rick hang out at the King Kamehameha club to discuss what their plans are. He was played by Roger E. Mosley.