In 2016, McInnerny joined the cast of the HBO series Game of Thrones portraying Lord Robett Glover in the sixth and seventh seasons of the series.
Lord Robett Glover is the Lord of Deepwood Motte and head of House Glover after the death of his brother, Galbart Glover, during the War of the Five Kings. He is the third to declare Jon Snow the King in the North after apologizing to him for not fighting for House Stark during the Battle of the Bastards. However, after Jon Snow bends the knee to Daenerys Targaryen, Robett Glover returns to Deepwood Motte and refuses to fight alongside the Starks in the Great War.