I've just read the sad news that Roger E. Mosley, best known for playing Theodore "T.C." Calvin in 'Magnum P.I.', has died following a car crash in Los Angeles last week. He was 83. T.C. was Thomas Magnum's helicopter flying buddy from their time in Vietnam.
From the article I read, Gerald McRaney was previously considered for the part of T.C. He was also once considered for the part of Luke Duke, but his only appearance in Dukes was as a workman in 'Hazzard Connection'. McRaney finally went on to take lead roles in 'Simon & Simon' and 'Major Dad'.