Mo Northover was the nightwatchman for a drilling project run by Dr. Nasreen Chaudhry and his father-in-law Tony Mack in Cwmtaff, Wales. He was taken by the Silurians underground and was subject to a dissection process by the Silurian scientist Malokeh that left a large scar down his chest. His son Elliot was also taken by Malokeh and put in a stasis chamber, while his wife Ambrose was left on the surface. With the help of Amy Pond who was also taken and nearly dissected, he escaped the Silurian laboratory and attempted to rescue the Doctor and Nasreen who had been taken hostage by Restac. They were taken prisoner again after the failed rescue but later released by Eldane after which he was reunited with his son. On the surface his wife killed Restac's sister the warrior Alaya, which helped prompt a military insurrection on her descent to the Silurian city with the body. They were pursued but with the help of Eldane again, managed to flee in the TARDIS, leaving Nasreen and Tony voluntarily behind.
