Jack's birthday is February 3, 1951, making him 37 years old at the time of this episode.
MacGyver: Jack, what are you doing?
Jack: What do you mean? You mean it isn't obvious? Gee, I thought it was really starting to take shape.
MacGyver: I can see it's a plane.
Jack: Oh, then I am making progress.
MacGyver: Why didn't you tell me any of this before?
Jack: Too busy aggravating you, I guess.
Jack: So, my old man's dead. That answers that.
MacGyver: What, you didn't know?
Jack: I never even knew what he looked like 'til now.
Jack: Mothers—sometimes they're more trouble than they're worth.
Francine: Jack, please try and understand. I was a bride, a mother, and a widow all at the age of seventeen. Your father was the only man I've ever loved. When he was shot down, I went out of my mind... I couldn't even take care of myself, much less my own baby.
MacGyver: Do you always sign your notes "a friend"?
Sparky: Well, listen, I just felt it was best to pass along the stuff anonymously. I… I didn't know if it was gonna upset you or make you proud.
MacGyver: You are unbelievable. I let you stay here for three weeks and you turn my place into a... a plane hangar.
MacGyver: After three weeks above the Arctic Circle monitoring whale migration, I truly felt there was no place like home: no howling subzero winds, no shifting ice, no wandering polar bears, no sushi sandwiches. Just the simple comforts of my own domain.