Nothing is known about Terrance's life before the apocalypse.
After Charlene's memorial service, Terrance is having breakfast with Gabe and other kids outside. Later, Terrance joins Gretchen, Alicia, Gabe, and other kids to the underground hangout spot where they drink, smoke from a bong, and talk. He listens intently as Alicia shares her experiences outside the ranch. Later that evening, Terrance and the others return to the main part of the ranch in good spirits.
Terrance is gathered at the front gate with Gabe and the other ranch residents as Madison, Jeremiah, and Nick reveal that the entire Trimbol family had been killed by the Native Americans. Terrance is very upset at the loss of his friend, Gretchen.