Rob (The Chromosome Connection)

Rob was a friend of Heather McCrimmon and a very close friend of Suze. All three investigated strange sounds underneath London. It all became too much for Rob and Suze as they ran from the sounds that led to Heather's meeting the Tenth Doctor. (DWA: The Chromosome Connection)

Reuniting
Rob and Heather were reunited when she returned to Edinburgh, keen to catch up with old friends, but Rob was too busy with university to spend time with her. (DWA: The Genius Trap)

Rob and Heather were reunited again when Heather and the Doctor returned to save Earth from the Seebees. (DWA: The Guardian of Murcher)

Rob also attended Professor Baily's tutorial, but this turned out to be a trap set by Heather's old enemy, the Mozhtratta, who took control of Rob and his university friends. (DWA: Dead-line)