Season 4, Episode 5 is titled "Adaptation" . It centers on the "trio" (Charles, Oliver, and Mabel) being manipulated by their doubles and features a major cliffhanger.
While many shows have an episode 5 in their fourth season, a few are specifically associated with "Three-Way" dynamics or titles: [S4E5] Three-Way
The request "[S4E5] Three-Way" could refer to a few different things, most likely a specific television episode or a technical guide for setting up a three-way call. Season 4, Episode 5 is titled "Adaptation"
In Season 4, Episode 5, titled "If You're Gonna Come for Me, I'll Finish You" , the Faithful must stick together during a mission to stop a murder while a Traitor faces heat at the roundtable. I'll Finish You"