Alfie Owens

Alfie Owens was the son of Craig Owens and Sophie.

Biography
According to the Doctor, who claims to be able to speak baby, Alfie liked his name, but preferred to call himself "Stormageddon, Dark Lord of All". He called Sophie "Mum", Craig "Not Mum", The Doctor "Also Not Mum" and everyone else "Peasants".

In 2011, while his mother was away for the weekend, Alfie met his father's friend, the Doctor, who could speak to him. Alfie accompanied them to investigate a Cyberman invasion and was transmatted onto a Cybership. That night, he was left in the Doctor's care and was attacked by a Cybermat. The next day, Alfie was left with a store clerk while his father went to help the Doctor fight the Cybermen. When Craig boarded the Cybership, however, the Cybermen tried to convert him into a Cyber-Controller. Alfie began to cry during Craig's conversion. Hearing his baby cry not only re-awakened Craig's emotions and freed him from the cyber-converter, but caused all of the Cybermen to start feeling again. The emotional feedback made the Cybermen and their ship explode.

Thanks to Alfie's crying, Craig, the Doctor and Earth were saved and the Cybermen were defeated. After this, the Doctor claimed that Alfie began calling Craig "Dad" and said he now preferred the name Alfie to "Stormageddon".

Alfie's first word was "Doctor". (TV: Closing Time)

Alfie is rumored to be the character "Ha-Ha" in the episode Nightmare in Silver, which takes place in the future. In the episode, Ha-Ha says he's heard of the Cybermen since he was in his cradle (TV: Closing Time). This hints that this may be Alfie as a grown up.