User blog comment:KillRoy231/Why'd they have to spare Gregor?/@comment-26973802-20150615060615

So from what I heard, in the Season 5 finale Qyburn - the same person who is "healing" the mortally-wounded Gregor, and who is believed to be a necromancer - introduces Cersei to Ser Robert Strong, who is not only the same size as Gregor (and is widely speculated to be him from the books), but appears to be played by the same person and, on the episode's page, is credited as Gregor?