Harry became MacGyver's "father" after his grandmother and real father were killed in a car accident at the age of nine. But seven years later, Harry left MacGyver to work in Alaska, sending money to MacGyver and his mother. At this time, MacGyver and Harry lost contact, but beginning in season one, MacGyver and Harry meet again in the episode "Target MacGyver" after eighteen years without contact. Harry dies of a heart attack in the fifth season episode "Passages".
Harry appears in the five episodes "Target MacGyver" (season 1), "Phoenix Under Siege", "Friends" (both season 2) "Passages" (season 5) and "Harry's Will" (season 6).