Trivia / Its Always Sunny In Philadelphia S 09 E 08 Flowers For Charlie

• Those Two Actors: Burn Gorman guest stars in the episode as a scientist experimenting on Charlie. Gorman and Charlie Day had previously played a scientist duo in Pacific Rim. Previously, Pacific Rim's director, Guillermo del Toro, had played Pappy McPoyle in "The Maureen Ponderosa Wedding Massacre".