Joel Mintz

 was a human living on Earth. He encountered a time rift caused by Albinex which transported him from 1993 to 1983. He was discovered by Isaac Summerfield. Joel later met the Seventh Doctor and Benny when Benny was looking for her father. The Doctor returned Joel to his original time. (PROSE: Return of the Living Dad)

Joel met time traveller Penelope Gate in 1996 and decided to join her. They became stranded in 16th century Japan, where they met the Doctor and Chris Cwej. (PROSE: The Room With No Doors)