"I just want people to be more aware of stammering, and I think Educating Yorkshire helped with this."
David Clews, creator of the TV series and an executive producer of the spinoff, added: "Seeing Musharaf find his voice in Educating Yorkshire was incredibly moving."
Musharaf, a former pupil at Thornhill Academy, Dewsbury, where the series was filmed, stole viewers' hearts when he overcame his stammer to speak at the school assembly.
He had overcome his speech difficulties with the help of his English teacher Mr Burton, who suggested he try out a technique he had seen in the film The King's Speech.
A special episode of Educating Yorkshire will air on Thursday, GCSE results day, when viewers will be able to catch up on former pupils including Musharaf. A week later, a third series of the fly-on-the-wall programme, Educating the East End, will begin.