In the season 8 premiere, âWinterfell,â the Itâs Always Sunny in Philadelphia star and co-creator got an arrow through his eye as Theon and crew snuck aboard Euronâs ship to save Yara. McElhenneyâs cameo isnât a huge shocker considering his relationship with GoT creators David Benioff and D.B. Weiss goes back years, with the duo even writing a 2013 episode of Always Sunny.