From Stargate - Wiki on Neoseeker

Andy Spencer
Played By:	Mark Hansen
Race:	Tau'ri
Planets:	Earth

Andy was the son of the barber Joe Spencer, who also had the Ancient Gene and had the ability to see what Jack O'Neill went through offworld. Though Andy at first was quite into the stories of SG-1, he eventually grew too old for them, and started to believe that his father was mad.

Key Episodes

• EP 815 - Citizen Joe