IT'S ALWAYS SUNNY IN PHILADELPHIA Pop Pop: The Final Solution -- Episode 802 (Airs Thursday, October 11, 10:00 pm e/p) -- Pictured: (L-R) Glenn Howerton as Dennis Reynolds, Danny DeVito as Frank Reynolds, Kaitlin Olson as Dee Reynolds, Charlie Day as Charlie Kelly, Rob McElhenney as Mac -- CR: Patrick McElhenney/FX | Episode 8.01 - Pop-Pop The Final Solution | Promotional Episode Photos | Season 8 | it-s-always-sunny-in-philadelphia | Gallery