When Duncan's old pal Cullen, a legendary immortal swordsman with a crippling coke addiction, winds up on a collision course with Richie (pun intended), Mac struggles to save his fallen friend and his young protege. The Rewatchers get pumped over one of the series's most realized characters, try to figure out how the impeccably named immortal Zoltan Lazlo got so dirty, and have their most bonkers debate ever over the entrance to Joe's bar (no joke it's insane).