The Gang's Still in Ireland

"The Gang's Still in Ireland" is the sixth episode of the fifteenth season of It's Always Sunny in Philadelphia.

Synopsis
Dennis and Dee explore their new accommodations in the countryside; Frank accompanies Charlie to find the truth about Charlie's Irish childhood pen pal; Mac has an identity crisis and decides to join the seminary.

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

Special Guest Star

 * Colm Meaney as Shelley Kelly

Guest Starring

 * Mark Prendergast as Gus

Co-Starring

 * Barry Edward O'Rourke as Bartender
 * Sonya Macari as Realtor
 * Miles Anderson as Father Michael
 * Stephen Marcus as Neaerby Patron
 * Stuart McLean as Another Patron