The Gang Carries a Corpse Up a Mountain

"The Gang Carries a Corpse Up a Mountain" is the eighth and final episode of the fifteenth season of It's Always Sunny in Philadelphia.

Synopsis
The Gang attempts to ascend a mountain in order for Charlie to fulfill an old and mysterious Irish burial tradition. But one by one, the Gang backs out until Charlie is left to honor the dead body alone.

Starring

 * Charlie Day as Charlie Kelly
 * Glenn Howerton as Dennis Reynolds
 * Rob McElhenney as Mac
 * Kaitlin Olson as Dee Reynolds
 * Danny DeVito as Frank Reynolds

Guest Starring

 * Mary Elizabeth Ellis as Waitress

Trivia

 * Mac's shamrock tattoo last made an appearance in The Gang Gets Held Hostage.
 * In the form of wardrobe detailing: While hard to see, Charlie's decrepit Vans have been swapped out for a newer, more durable pair. This was likely done to avoid damaging the originals and possibly for the comfort of Charlie Day, who spends the entire episode outdoors and in mud and torrential downpour.