Robert Clohessy, who plays Lieutenant Sidney "Sid" Gormley on Blue Bloods, has been a regular on the show since it began. Speculation arose about his potential departure after his character faced challenging plotlines in the eleventh season. However, these worries were unfounded as Clohessy remained a recurring character in the recently concluded twelfth season. He also appeared in a post celebrating the show's renewal for a thirteenth season, indicating that both Clohessy and Sid will be returning. Sid was originally intended to be a one-off character but became a series regular due to Clohessy's chemistry with the cast.