After being gone from the show for seven years, Jimmi Simpson confirms he is returning for It’s Always Sunny in Philadelphia season 16. Simpson has a recurring role in the long-running comedy series as Liam McPoyle, a member of the creepy and incestuous family who first came into Mac and Charlie’s lives during elementary school and are seen frequently contending with the Paddy’s Pug Gang. The McPoyles have done everything from taken the Gang hostage to nearly having a wedding breaking the family bloodline resulting in Liam losing an eye.