Gareth Roberts has revealed that he will be returning to the Doctor Who team this year. Issue 139 of Quench, a Cardiff student lifestyle magazine, features an interview with Roberts and reports that he is "currently working on the new Peter Capaldi episodes for Doctor Who Series 8". The whole interview can be found here.
Roberts has written five episodes for Doctor Who in the past: The Shakespeare Code, The Unicorn and the Wasp, Planet of the Dead, The Lodger and Closing Time, as well as writing a number of episodes for spin-off series The Sarah Jane Adventures. Outside the Whoniverse, his other writing credits include Wizards vs Aliens and Emmerdale.
Gareth Roberts is currently the fourth writer confirmed for Peter Capaldi's debut season, joining Steven Moffat, Mark Gatiss and Neil Cross.