|Harry Jackson (MacGyver's grandfather)|
|Real Name:||Harry Jackson|
|Family:||Angus MacGyver (Grandson)|
|First appearance:||Target MacGyver|
|Portrayed by:||John Anderson|
Harry Jackson, Angus MacGyver's grandfather, became MacGyver's "father" after his grandmother and real father were killed in a car accident. Seven years later, he left MacGyver. After another eighteen years (stated by MacGyver as "it's been six..seven...eighteen years"), Harry and MacGyver meet again in the season one episode, "Target MacGyver", in which MacGyver and his grandfather work together to defeat an assassin named Axminster (played by D'Mitch Davis). Harry dies of a heart attack in the fifth season episode "Passages".
Harry is one of the few characters to address MacGyver by a name other than "MacGyver" or "Mac," often affectionately calling him "bud."
- The actor, John Anderson also appears in the original Hawaii Five-O in 1971.